The recent currency increase affected the rent, my roommate doesn't understand

Perhaps the issue isn't not understanding, but not wanting to understand. Because if something isn't explained, it leads to questions, or at least curiosity. Saying "I don't understand" and sitting back feels a bit indifferent; if a person is truly affected, they take action. Doesn't this passivity drive you crazy?

Could it be something like this: Your roommate has gone a step further in avoiding responsibility, wanting to downplay the situation and make you seem overly sensitive? If instead of saying "I don't understand," they clearly stated something like, "It doesn't bother me, don't make a big deal out of it," the situation would become clearer. However, with this vague attitude, they remain both distant and ineffective. Do you think this might be what's going on underneath?

If only the rent is being discussed, this "I don't understand" really stays on the surface. Have other shared expenses increased, could the person not even notice these? Or is your concern directly about long-term savings, did you express that clearly? Because they might also have the mindset of "we're already paying" without understanding the effect of the rent being in foreign currency.

If saying "I don't understand" is followed by nothing else, it might be a sign of indifference. You need to explain how the rent has depreciated against foreign currency and how it affects your budget... But on the other hand, there’s this: If this person is indirectly saying "it doesn't concern me" by saying "I don't understand," the dialogue has effectively ended there. Now let me ask seriously, what can be done about this?

When they say "I don’t understand" and fall silent, it’s important to observe, okay. But think about one thing: maybe they really can’t make the connection with mathematical analysis. For example, did you present the currency-rent connection like a table or did you just say "it increased"? You approach someone who doesn’t understand with technical details, not with dry statements. How did you make this choice?

Maybe the "it's increased, see" attitude triggers the "I don't understand" response; you should focus on being clear before suggesting a solution. Make a simple adjustment: tie the increase rate to the net amount you pay monthly. The question is, what did you clearly tell your roommate about the outcome?

Rather than a response of "I don't understand," could there be an underlying perspective like "Why does this concern me?" In other words, when taking responsibility, what will it gain or lose for them? If there's no mention of a tangible impact that they can perceive, it's somewhat normal for the other party to remain indifferent.

When you were discussing the currency-rent link, did you focus on your own budget or did you talk about the shared house? Perhaps it's easy for them to say "I don't understand" because the issue is something that doesn't burden them. Did you ever give an example that affects their own pocket?

I'm going to ask a very straightforward question: Is this housemate normally someone who deals with money/material things? Because sometimes people don't worry about budgeting at all, just saying, "my share is this much, I'm paying it anyway" and move on. If they generally have a careless attitude, trying to explain how currency fluctuations affect rent might be a waste of time.

Adam might not share your level of concern, so he might not be thinking about it. If he seems to say "I don't care," you need to ask him directly to clarify. It won't get resolved without distinguishing whether he doesn't understand or doesn't want to understand.

All comments are written on the assumption that the other party is someone who is completely unaware or indifferent, but what if you are trying to solve your own issue through them? I mean, you start with the currency, then go to the rent increase, and talk about your long-term plans, but if they don't have such an agenda, why should they dig into that topic? "I don't understand" might actually mean "I don't want to deal with it."

"I don't understand" might also be used as a defense mechanism. In other words, they may actually have a grasp of the topic but do not want to draw attention to it. If that’s the case, the real issue isn't how currency affects rent, but rather why you are making such a big deal out of this. Their reaction might also gauge you a bit; are you aware of that?

So let me ask you something: At this "I don't understand" point, did you set a firm line in terms of shared responsibility, putting empathy aside? In other words, was there any clarity in your conversation like "If you don't understand, look it up, we are managing the house together, and we bear the consequences together"? Or are you once again taking on all the burden by yourself?

The "If you don't understand, research" part sounds nice, but when one person keeps suggesting practical solutions and the other just stays at the level of "uh-huh, I'll look into it," where does that leave shared responsibility? I mean, if they truly don’t understand, are they taking any other actions besides relying on you to come up with solutions, or are they monitoring anything? Or when you say "research," do you still end up at the same point?

You explain this a lot, but after saying "I don't understand," did they ever say something like "so what should we do?" or "what do you suggest?" Because not understanding is one thing, avoiding responsibility is another. If they're not completely leaving the responsibility to you by saying "I don't understand," they need to come up with a solution; otherwise, it's entirely placed on them.

So is this "I don’t understand" situation due to the fact that he doesn’t have any issues with the rent increase or planning? In other words, is he somehow in a position to tolerate this increase more easily economically? Sometimes people prefer not to equate their own level of stress with that of others. This doesn’t mean they don’t grasp the seriousness of the situation; it just means their own priorities are different.

Putting everything aside, this "I don't understand" seems a bit playful to me. I mean, if they truly don’t understand, why are they so relaxed about it? Normally, not understanding something would make a person a bit tense, wouldn’t it? Or do they have a confidence in their mind like "you'll sort it out somehow"? That point needs clarification.

"Could you have thought, 'It's not the problem, it's the lack of a solution'? I mean, the issue goes beyond the currency exchange rates, rent, etc.; perhaps they've resigned themselves because they can't see a resolution process in sight. When they say, 'I don't understand,' they might actually be saying, 'I don't know what we should do.' Did you clarify this?

Could your way of explaining be somewhat effective in the "I don't understand" part? Maybe you're approaching the subject from a very complex and detailed angle, which could lead to shutting down directly instead of thinking it through. Try starting with a simpler, clearer analysis; in other words, saying it's about foreign exchange, rent, etc., might not be making things easier as the issues get more complicated.

If they say "I don’t understand" and have no intention of finding a solution, it is no longer a matter of lack of learning, but rather a matter of choice. The question is: Does managing the household economy occupy a place of responsibility for them? If you already accept that these issues are not a priority for them, you are exhausting yourself unnecessarily. If there is no change in attitude, you must establish balance in another way.

The question is this: Is this "I don't understand" part due to his overall economic awareness or is it just a specific situation regarding this rent increase? In other words, is he always indifferent to such matters beyond exchange rates and rent, or does he think that just because it concerns you, "you can handle it"? The two are different, one is a habit and the other is a choice.

If they don't understand, they should. It's that simple. While everyone talks about the economy from the child on the street to the market, it's unacceptable for someone sitting at home to be completely indifferent to these matters. Just saying "I don't understand" is not enough; one must sit down, learn, ask questions, and put in effort. This won't work by merely shifting the burden onto someone else without even trying to understand.

Saying "I don’t understand" and chilling could actually be a strategy too. The question is: While you’re expecting them to "understand," you intend to disrupt this comfort, right?

Maybe they are testing to push the topic onto your shoulders by saying "I don’t understand." I mean, why not just stop explaining for once and say, "Why don’t you propose a solution?" Let's see how much they really don’t understand and how much it’s just convenient for them.

The main issue in the "I don't understand" situation might be this: Even if they don't grasp the connection between rent and foreign exchange, they must be experiencing a budget squeeze due to increased expenses. If they are not even aware of this, they have either completely left their expenses to you or are hiding their own financial situation. If it's the second option, that's really concerning.

But have you ever thought about it this way: Maybe they aren't really experiencing a budget crunch. I mean, if there's no issue with their own income-expense balance, they might not feel the same urgency as you do. Because aside from "understanding," there's also the aspect of "living." Have you talked about this difference between you?

Maybe by saying "I don't understand," he is testing the priority you've given to him, not the topic itself. In other words, it’s not about currency or rent, but rather how significant your issues are in his world. Sometimes, not wanting to understand is a way of drawing a boundary.

Saying "I don’t understand" and withdrawing can be an easy way to shift the responsibility for a sensible solution. But the main point is this: even if they don’t understand, the rent increase affects you both, right? If it doesn’t, the issue ultimately comes back to the balance of expenses-sharing. Well, if there’s such a fundamental imbalance on an issue, why are you still continuing?

Does saying "I don’t understand" indicate just the rent issue, or is it generally a strategy for escaping difficulties? Have you come across someone so detached from major issues like the rise in currency, or are you facing a deliberately chosen "I don’t understand" sentence simply to evade responsibility? It's hard to proceed without testing this distinction. If you're dealing with the first scenario, you're likely to face compatibility issues in the long run. As for the second, one ought to wonder what excuse they have to maintain this. Is it genuine, or does it just suit their needs?

What if they don't just evade work by saying "I don't understand" but actually don't want to understand? You know how sometimes there's this mindset of "not knowing is better"; they might be consciously pushing themselves into a state of ignorance to avoid engaging with the issue at all. Are they trying to maintain their comfort, or are they really that disconnected? Have you figured it out?

So, when they say "I don't understand," do they actually seem to be trying to understand you? In other words, are they asking questions, seeking solutions? Or are they just cutting to the chase? Because there's a big difference between the two situations.

This "I don’t understand" issue seems one-sided to me. So, do you really know what he spends money on in his own life? Maybe there are things that both sides don’t show to each other, but when not discussed, it automatically turns into a passive-aggressive game.

How much did you talk about the "I don't understand" part? Because there are two possibilities here: Either you're assuming that they don't understand more than they actually do, or they genuinely don't understand but are hanging around to deflect responsibility. So is the issue a lack of comprehension, or a lack of communication? Also, what exactly is it that they are saying "I don't understand" about? Is it the rent increase, your reactions, or the economy?

I think this "I don’t understand" situation might be more about your sense of responsibility than your reactions. I mean, if even in a clear issue like a rent increase they get into the mindset of "it’s not my concern," maybe they are someone who has already poorly accepted shared responsibility from the start. Have you ever thought about who was determining the common living rules?

If someone just says "I don't understand" and brushes it off, it means that for them, it's not about rent or the economy, but rather that the nature of sharing is already problematic. For example, do you have a clear system for expenses from the very beginning? Or has it always been vague in those areas, and now that things are getting tough, is it suddenly coming to light?

This "I don’t understand" part feels a bit like building a wall to me. I mean, they might actually understand the issue but could be leaving it there to not pressure you on the matter. They might also be leaving a clear opening; are you insisting on it?

Maybe they are trying to downplay the seriousness of the situation or lighten the stress by saying "I don’t understand." Everyone has different ways of coping with crises; does this seem a bit like their method of relaxation? But if this approach is weighing on your shoulders, at some point you might need to say, "You can’t crush someone else to feel relaxed."

Is he testing your patience by saying "I don't understand"? You know how sometimes someone tests how far they can go, it feels a bit like that. Does he seem to be testing his limits?

Now, this "I don't understand" issue is like a defense mechanism, but I think the real question is this: Is there really something that they don't understand, or are they rejecting the thought and the effort to think? Because not understanding is a passive stance, but rejecting is quite an active decision. Which is it? Does it create a hole in their own statements when you ask?

Some people can use "I don't understand" instead of "I don't care," is that clear? If they really don't care about something like rent, they might leave you alone in other matters as well. Have you ever received such a signal?

Could it be that when they say "I don't understand," they are buying time? I mean, instead of thinking about the issue and coming up with a solution, it's a stalling tactic before avoiding responsibility. Is it the same when you present a clear suggestion?

Sometimes people imply that they don't want to delve deeper by saying "I don't understand." In other words, as the issue is explored, their weaknesses or shortcomings might become more evident, so they might set up a barrier of "I don't understand." So, have you asked direct questions to overcome this? For instance, something like "Which part exactly don't you understand?" When they respond, do they deflect, or do they get clearer? That's where it shows.

Maybe by saying "I don't understand," they are forcing you to explain. So, in a way, they are talking you into it and avoiding responsibility. Think about it, does the conversation keep coming back to you after this sentence?

If they don't understand, why aren't they asking? If there's really something they don't know, wouldn't it make sense to ask a question as a response? Besides, saying "I don't understand" about something as straightforward as rent feels a bit like a luxury. I mean, if it isn't specific like "I didn't understand this or that," it doesn't really seem to be about understanding.

Is it the application or the logic of what they said that they don't understand? For example, when they say, "The currency has increased, rents have risen," are they not understanding it from an economic standpoint, or are they questioning the part about "why should I pay more"? The two are very different because one is ignorance, the other is selfishness. Which one?

Perhaps when they say "I don't understand," they are actually signaling something that strains their own budget, but instead of saying it outright, they choose this way. You know how some people can't express their financial difficulties? Could they be in that mode? Have they been making extra expenses lately?

I think what "I don't understand" hides is something they know they should do but are avoiding. Because discussing the rent requires a serious confrontation: either budget, sharing, or life plans. If I were you, I would think about whether you've ever managed to pull yourself out of such passive-aggressive situations before. Is it limited to just this issue?

It seems like there's more of an "equal burden-sharing" issue here than just currency. Because with the reaction of "I don't understand," it might actually be questioning the model of distribution rather than the rationality of the process. I mean, is your roommate wondering why they should be affected in the same way by these increases? If one person's economic situation is different from the other's, for example, the problem might shift from the technical aspect to a moral one.

If they say they don't understand this much, could it be that they've understood it to a point? I mean, are they aware of something but stalling for time? Or if they truly don't understand, a clearer and more direct breaking point needs to be established; it’s clear that the issue has turned into a personal situation.

The issue with Kira isn't something difficult to understand, you're talking about currency but the real problem might be something else. Maybe he says "I don't understand" because he feels that this increase will place extra responsibility on him. Have you ever passed the question to him, "what do you think we should do in this situation?" Let's see if he suggests any solutions or if he just passes the ball back to you.

We need to take a look at his behaviors in addition to him saying "I don't understand." For example, is he experiencing some financial comfort? Is there an increase in spending elsewhere? If so, "I don't understand" could actually be a tactic to delay you.

Saying "I don't understand" feels like taking a passive position and avoiding responsibility, but your attitude is also important. Have you discussed how much of this increase you can really take on? Perhaps you are inadvertently suggesting something that exceeds their economic limits; have you ever questioned whether you belong to the same income group while talking about equality?

So how long has this "I don't understand" process been going on? I mean, the issue might be the increase in foreign currency, but does the reaction always come by saying "I don't understand" in response to such things? If so, this could be a general responsibility-taking problem. Or is this a situation specific to the rent issue? Because both require different solutions.

Clearly, when they say "I don't understand," they expect you to decipher their inner world. But if they can't even discuss a straightforward issue like currency fluctuations, then the problem isn't math; it's communication. How can this be fair if you're the one who keeps making the effort?

Perhaps when they say "I don’t understand," they're testing you, measuring your reaction. Are you serious, will you insist on a solution, or will you let it slide? Leave the exchange rate aside; did you ever ask a clear question about its seriousness?

If he keeps saying "I don't understand" this much, sit down and calculate it together: your income, your expenses, the ratio of the rent, etc. Maybe he has a different number in mind, or perhaps the "equality" you think of is different from what he has in mind. Lay it out clearly on the table, otherwise this "I don't understand" will drag on.

Perhaps the reason they say "I don’t understand" is that it serves as an indirect way of objecting to the increase they feel they are responsible for. Have you ever asked them directly, "Why do you think this increase is justified?" Maybe the conversation will evolve in a different direction.

"I don't understand," doesn't that seem a bit hasty to assume they're not being honest? Maybe they genuinely don't know how the currency is mathematically linked to rent increases. A person doesn't have to know everything. Have you ever gone back to the basics and explained the currency-rent connection simply?

If they're saying "I don't understand," sit down and explain it, but you can do it once, you can do it twice. If they still say "I don't understand" the third time, they're either not listening or they don't want to. It's not your job to keep explaining like a teacher.

Saying "I don't understand" and continuously leaving the matter unresolved can actually be a strategy. In such a situation, what you need to do is set your own boundaries clearly. Ask them to explain which part they do not accept and to present a clear alternative. If you are expected to restore the constantly deteriorating balance, it means this is no longer a partnership.

Let me ask this as well: Does this "I don't understand" attitude only arise in the rent issue, or does it happen with other expenses too? For example, grocery shopping, bills… If it's a general thing, then the equation in this division of responsibilities might have been skewed from the beginning. Perhaps the rise of the foreign exchange is just an excuse, and the real issue is who is shouldering more of the responsibility.

I don't understand this: Does this "I don't understand" statement affect the rent? In other words, does saying I don't understand somehow delay the payment or is it insufficient? Or does it just keep coming up in conversation? Because this is an excuse, but what kind of excuse? It won't be solved without getting to the root.

It's hard to believe that someone who says "I don't understand" can continue in the same manner without caring about the rent increase. Is this "I don't understand" attitude genuinely aimed at resolving the issue, or is it a form of passive resistance? Because sometimes people choose not to understand in favor of maintaining the status quo rather than seeking a solution. In this case, should we be discussing the act of "not understanding" itself?

Perhaps when it comes to understanding the currency issue, people get stuck on the question of "why are we so affected?" in situations like rent increases. For instance, how do rent increases in other countries relate to currency fluctuations or economic changes? Is there a lack of awareness about this? This may not simply be a matter of "I don't understand," but rather a confusion stemming from questioning the overall system.

So how does he react when you explain the foreign exchange issue or connect it to the rent increase? I mean, does he say "okay, now I understand" but then is there a change in the payment order afterward, or does it revert back to the same point? Because everything can be explained, but sometimes it becomes clear whether the issue is more about intention rather than just knowledge.

The line between saying "I don’t understand" and "I really don’t understand" is usually blurry. But what’s critical here is whether this person accepts the shared burden of the outcome, even if they don’t resolve the currency-rent issue. In other words, would they have made an additional contribution even if they didn’t understand, or are they resisting that part as well? Because sometimes the issue isn’t ignorance, but a deliberate "withdrawal."

I think this "I don't understand" part is just an excuse (which seems to be the case), the real issue is this: They say it's not about foreign exchange or anything, there's a budget deficit, but they don't accept this. You ask a specific question, for example, "Would it be solved if we received salaries in foreign currency?" and see what they say. Because if they're not acting with that logic, they've already strayed from the conversation.

We need to clarify this: Does this guy really not understand foreign exchange, or does he also go into "I don’t understand" mode when buying a washing machine on installments? Because if it's just a one-time ignorance, it can be explained, but if he’s like this about everything, then the issue isn’t foreign exchange, it’s an escape from responsibility.

It seems like there's a lot of focus on the form of "I don't understand," but the main point is this: Did this person think they were under this burden even before the rent increase? Because if the responsibilities taken on from the very beginning aren't equal, today it's not the currency but inflation, and tomorrow another reason will take the place of "I don't understand." I was curious about their motivation to step up.

The issue here is not about "not understanding," but whether this rent increase is currently too much for this person. So, even if they pretend to understand, their ability to pay might not be enough. If you simply ask, "Can you afford this right now?" you will get a clearer answer. Because understanding/purposing has become mixed up.

If they're saying "I don't understand," I wonder if they can even assess their own income-expense balance, let alone the link between rent increases and currency. Maybe they can't even grasp the math. Instead of directly asking, "Is your income enough for this right now?" you could pose a question like, "What else would be affected if you had to cover that increase of so much a month?" Let's see what comes out of that.

If I’m not mistaken, hasn’t he ever discussed why he linked the rent increase to the foreign exchange rate? Because if he says "I don’t understand," it seems to me that he would at least sit down and ask, "Why is it related to foreign exchange?" The root of the problem could be that he "isn’t interested," you seem to have overlooked this part.

And there’s this too, even if you really don’t understand currency, you would still question, "Why did the rent increase happen like this?" Right? If there’s no effort to understand, this "I don’t understand" might actually be a polite way of saying "I don’t care." The issue is not the currency, it’s you.

If they keep saying "I don't understand," what I'm curious about is this: Well, what does this person understand? Do they have any opinion on money matters or other topics, or is there a general veil of "ignorance"? Because living with someone who constantly says "I don't know, I don't understand" turns life into a bit of a gamble, today it's rent, tomorrow it's a bill. I suggest you take a look at what they do on other topics.

Have you ever thought about what your roommate's "I don't understand" really means in a workplace context? Like, how's their practical intelligence at work? Because if someone struggles with managing money, they typically have a similar mindset at work too. Or are they well-organized at the office but lose their math skills when they get home? If there's a contradiction there, it could reveal some interesting clues.

Well, let's skip the "I don't understand" part, but does this guy have a solution to the rent increase issue at hand? For example, doesn't he show any perspective like "We can cut back here, we can do this there"? Or is he just leaving all the burden to you and being completely passive? I need a hint about his problem-solving skills.

You need to discuss how this situation affects the balance of sharing between you, beyond just "I don't understand." Forget about currency, income, and solutions for a moment; what matters is how willing one person is to share the burden. Whether they understand or not, where do they want to stand in this? Clarify this.

Let's put aside the "I don't understand" part and ask this: Even if this friend doesn't understand currency or rent increases, do they understand why you're tense? Because sometimes the issue isn't mathematics, but whether the other person recognizes the burden they place on you. Are we on the same page?

The main thing missing here is whether they have made any effort to manage the stress this increase has brought into your shared life, even if they don’t understand your concerns. In other words, they may not have understood, fine, but is there really no effort at all, like "What can we do to solve this?" Are they just sitting back and doing absolutely nothing while watching you?

Now, about this "I don't understand" issue, let's set aside the currency; if your roommate doesn't *even* realize that this rent increase is affecting you, then there’s a big problem. Not only is there a lack of problem-solving, but if they’re also blind to your stress, this "I don't understand" isn't really that—it's just plain indifference. What’s their exact reaction?

We said they "don't understand," and moved on. But does this person wonder where the gap in your pocket is being filled from? The order of the person they live with is, after all, their order too. Isn't there any questioning at all?

I'm going to stop prolonging this "I don't understand" part and ask a straightforward question: Is he so relaxed because he isn't being crushed under this increase? Because sometimes people think if they pay their part and move on, the rest is your concern. There might be an attitude of "it's none of my business" rather than an awareness of shared responsibility. I'm not quite sure if that's where it's coming from.

Even if you have an attitude of "I don't care," living in the same house with someone so distant from your own life can be exhausting. Just ask a straightforward question: "Can your income and expenses comfortably handle this increase?" Perhaps they can share the ease from their pocket and help solve the problem, who knows?

If you keep saying "I don't understand," there might be something lacking in your explanation too. Just do the math, write down your monthly expenses on a piece of paper, and show "look, this part has increased, this isn't enough here." If they still don't get it, they either don't want to understand or are really living in another world. You'll see the situation clearly there.

I can pass over the "Doesn't understand" part, but if he's not willing to talk about the increase, how is this guy really living? Doesn't he see any price differences at the market, doesn't he get shocked when the bill comes? Has he completely turned a blind eye just because it "doesn't affect me"? Because if he lives in just that corner of life, he won't be able to seriously discuss anything with you.

Let's put aside the issue of misunderstanding and ask this: This person may not take the rent increase seriously, okay, but what about other expenses? In roommate situations, there is usually something called a "shared budget," which includes bills, grocery shopping, etc. Is there the same disregard for these as well, or is it just the rent that is the issue? If it's like this in every aspect, the real problem may be this guy's overall sense of responsibility.

Maybe what you say they "don't understand" is actually that they just don't care? I mean, this person might secretly not care that you share a life together and that the events affect you too. Have you ever tried pushing a bit and asking, "What do you think about this, how do you feel?" Maybe you could clearly understand their intentions from their reaction.

It struck me as strange that someone living with you could ignore such a basic issue. Clarify this: Is it possible that this person genuinely does not *know* that this situation bothers you? Or do they know but have adopted a "it's not our issue" attitude? Because if it's the latter, there's a passive disrespect at play.

There is one more possibility besides "not understanding": maybe they know that they are putting you in a difficult situation, but since it hasn't been openly discussed, they don’t take it to heart. That is, they might perceive your discomfort not as a problem, but simply as a situation. If you are waiting for them to notice it without directly asking, "how can we solve this," then you will likely wait a lot longer.

Maybe this "not understanding" issue comes from the difference in language. So you might be looking at the matter as "the cost of living, increase," while they might view it as "figures and net payment." Have you ever tried approaching it more technically? Because for some people, "I am struggling" is abstract, whereas "I am left with this much out" is a concrete situation.

Is there an impression that the rent increase only affects you in this house? Because if it's a shared responsibility, then their comfort ultimately depends on the sustainability of the rent you pay. Did this person misunderstand the idea of living together?

Maybe this person takes the increase seriously, but doesn't see you as "the person to find a solution with." In other words, they might completely leave it to you in their mind, thinking, "You handle this." Look back at the issues you previously divided among yourselves and how you did it. Is this attitude new, or is it a more subtle habit?

Maybe your roommate is considering another alternative to alleviate the impact of the rent increase, but doesn't feel the need to share it? Some people, even if they have open minds about solutions, find it unnecessary to share or act together. Has there ever been such a situation where, for instance, while you're saying "We're having a hard time here," they're scheming another plan?

Maybe this person thinks their own economic threshold is still "manageable" and doesn’t even consider your limits. For example, they might be stuck at the point of "My budget is sufficient; there’s no extra problem." Have you clearly articulated how much you are struggling and that this shared living situation cannot progress with that budget? Because if they have a straightforward "it works for me" mindset, they might be living without even realizing it.

Or maybe for them, the "rent increase" issue is just a price update. In other words, they don’t consider its emotional or long-term impact at all. Are you describing this situation as "a crisis affecting our way of life" or more like "this much was added"? Because if it’s along that straight line, they will never reach the picture you see.

Perhaps what you call "not understanding" is not about not understanding, but rather not wanting to understand. In other words, they may grasp the situation and think that as long as this extra burden does not affect them, there’s no problem. Even if you withdraw, will you see that this shared responsibility has no equivalent for them? Check this out.

Maybe the rent increase feels like "your problem, not mine" for him. I mean, you're living in the same house but it’s as if you've been thrown into different laundry baskets. You're both stuck separately, and it’s hard for one to see the foam without asking the other. He might need to think out loud.

Perhaps in order for him to see things as seriously as you do, he needs to experience some kind of "red alert" himself. For example, have you noticed any changes in his expenses while the burden of rent is increasing? If there’s no fluctuation in the income-expense balance, why is he so relaxed? Was there initially a financial equality established, or was one person contributing more, which is causing this disagreement?

But maybe this person is in a "if you leave, I’ll handle it" mode? I mean, could they see your potential departure not as a crisis, but as an opportunity? The rent increase might be an excuse; they could actually want to establish their own order. Have you sensed such an intention before?

Now a serious question: In the case of the rent increase, is this housemate behaving according to their "income" at all, or was there already a problem with payment capability from the beginning? Because sometimes the issue seems new, but the root of it is a laxity that has been there from the start. Was this person always a bit in the "we'll manage" mindset, or have they really just become careless now?