Iam i wrong for asking my boyfriend.....?

You have already told him how you feel, nothing more you can do. It's his life, not yours, and you should not try to advise him or change him or his mother. You have only one thing you can control about the situation: whether or not you can deal with it. If you cannot, than break up with him in a kind way. If you feel that you can deal with the situation, than try to. Good luck.