Hi, Amborz,
I think I'd start with some Al-Anon meetings. I don't know whether you are in AA, but there are a lot of "double winners" out there. I'm not active in Al-Anon right now because I'm focused on my own AA and I'm no longer living with active alcoholism, but believe me, it was a lifesaver for me when I was.
Most important, you need to protect your OWN sobriety. It must be a very difficult situation for you. You gotta keep yourself healthy and sober, regardless of what he decides to do.
Stick around, you will find a lot of support here, too.