The finances can be complex related to
divorce and each situation is different. Each
state has different laws too. Do you know the laws of your state? Is the house in both your names? I understand the fear you have of losing money on the house and having to find another home for yourself. It stinks. Getting a spouse out is a bit hard. Divorce should do it but you need someone to advise you. Document everything related to his drug use. Take pictures. Record things.