((((stayin alive))) I don't match who you are looking for advice from, but I do understand how you feel. My XAF lived with his mom for a while too (about 11 months) and he frequent relapses were very trying on their relationship. He did eventually move out - it only took a month for his drinking to accelerate and for me to leave him. It has been 6 weeks now and I don't think he is doing well.
Just my story - I am sorry for your dilemma and I look forward to the advice others are sure to post. Take care -