Cpompletely agree with Ladyscribbler. The best thing you can do is take care of you, and get out of his way. You didn't Cause it, can't Cure it, and can't Control it. From reading your post, I don't see a serious effort at recovery. Not drinking is not the same thing as real recovery. You can't get him help, you can't show him what he's doing. He is responsible for his choices, including the choice to drink.
My best advice is "Let go and let God". Find an AlAnon group near you, start learning all you can from the experience and strength in those meetings. Move on with your own life and take care of you. Trust me, you do not want to get caught on this roller coaster ride.