To tell the truth, he is not the only one who doesn't offend. You are worried about offending others. You can ask your closest roommate and see what he says. When our roommates got married, they gave us a lot of money even if they didn't want to go, but we just made an excuse not to go. Our money has a basic number, and most people work out this basic number, except when it is particularly iron. I think you mainly think you have too much money. Why are they all unified? A good relationship naturally pays more. It doesn't matter, of course it will be less. That's understandable. Since you are your roommate, you are not the only one who has a general relationship with him. Discuss it with others.