First of all, I am so sorry you are going through this. Alcoholism is a nasty, progressive disease, and destroys everything it comes in contact with.
YOU cannot do anything to fix or control this. You and he both are powerless over this addiction. One does not "snap out" of this, and usually addiction (alcoholism) is merely a symptom of other underlying issues (depression, and who knows what else in his case).
My mother was a "functioning alcoholic", and I watched her VERY slowly deteriorate over the years. She did not stop drinking until last year after 30 years. She had lost everything by then.
He has to really want it for himself, and oftentimes we as significant others or family members do more harm than good by not letting go and detaching. We enable, clean up their messes, cushion them from the falls, and inevitably prolong the inevitable.
Don't know if you know about this, but here is a REALLY great forum for friends and family of alcoholics. I think that is a more appropriate place for you queries. A place where you can get some real answers specific to your situation. Friends and Family of Alcoholics - SoberRecovery : Alcoholism Drug Addiction Help and Information
Hugs, and best of luck to you. Feel free to PM me if you need to vent or talk.