There are two of us at home, but we split the rent and bills exactly in half. Yet our rooms are different sizes. My room is smaller, but I pay the same amount. Should I say something or should I not overthink it? Do you think these kinds of things should be discussed?
Honestly, I would discuss it directly in such a situation. Because peace is one thing, but after a while, this injustice starts to get really frustrating. You can calmly and amicably talk about the sizes of the rooms and offer suggestions.
In our student house, everyone paid according to their own room. For example, I paid less because my room was small, and the living room was shared, so it wasn’t included in the calculation. There’s nothing wrong with that; I think it can be discussed 
But the thing is, it’s clear that you accepted this from the beginning when you entered this house. If you agreed on the rent together at the start, then why is there a problem now? How many months has it been like this? I mean, was it just the difference that bothered you now?
If these types of things aren’t clarified from the start in shared housing agreements, there will always be problems. To create a more transparent arrangement, for example, rent can be calculated per square meter. Bills are already split, but care should be taken regarding the room arrangements.
There is also this situation, my room is a bit smaller, so naturally it’s a little cooler. Since his room is larger, he uses an electric heater in the winter. Would this count, in your opinion? Honestly, I’m still undecided about whether to talk to him 