I'm sooo sorry for what you're going through...I'm not sure I even know what to say....except...have you talked to him and is he admitting it or denying? Is he open to check himself in somewhere? You have to take care of yourself as well...maybe he needs something drastic ( you leaving) to get himself help...I have alot of friends who I was in rehab with last year and they are still drinking or worse...but I try to encourage them but they're not ready to stop....he has to be ready....or have an ultimatum or get arrested/ go to the hospital/ lose his job/ you...etc..you know what I mean....I don't know....but maybe you need to leave and be there after he gets help...but you can't lose yourself and get hurt along the way....good luck...hopefully someone has better insight...
Hugs!