I'm sorry, lido, I guess I did not make my message clear enough. It is great that you are concerned about your boyfriend but it seems to me that there is almost a 3-way going?

If your boyfriend tells you his concerns, that's great, you sound like you are a good listener. But if your boyfriend won't do anything about his issues/complaints, his roommate, what are you left with?

You're upset about this guy you don't care about particularly, this younger man and his "********" and, it seems, getting stressed about it somewhat; but the problem that I see is that you can't personally do anything about this third person, you can't go through your boyfriend and fix him/get the money your boyfriend is owed/get rid of him, whatever. So, you are stuck being vicariously stressed. Is that what you want for yourself?

If I had your problem, I would either listen to my boyfriend and "that's it". One can empathize with others problems, but not solve them for them; or, I would tell my boyfriend that discussing his roommate and the problems he has with him without doing anything to solve them was stressing me out and I'd like him not to discuss the guy anymore. One cannot change other people, only our own responses to them.