How can i stop my mum bing an alcoholic?

Well,: You can't control your mum or anyone else. Let her know you love her & what your concerns her. Encourage her to consider attending alcoholics anonymous. You could offer to drive her to a meeting or to attend an open meeting with her. The best thing to do is to take care of yourself. You will develop a support system and learn to better cope with having an alcoholic family member through al anon.