I have no idea how to tell my spouse about the divorce decision

I really can’t take it anymore, I mean every day the same things, the same fights are over. I feel everything but I just can’t seem to confront and talk about it. There are no kids involved, but we still have a history together. Honestly, I don’t have the courage, but I’m unhappy like this too. I’m tired of crying every day; give me some advice on how to start this conversation. Show me a way.