Your post, again, is all about HIM. You're focusing on the wrong person here. Everything he has told you indicates that he doesn't want to stop drinking. He is telling you who he is, so believe it. The odds of him getting and staying sober long-term are slim.
Do you want to What If yourself for the next five, 10, 15, 20 years? Because that's what life with an addict brings. What do YOU want for YOURSELF in life? What kind of marriage do YOU want? What kind of father do YOU want for your future children to have? What are YOU prepared to do should you have children in an alcoholic home? It's a hell on earth that no child deserves. What about YOUYOUYOU??? Forget about HIM right now. You need to figure out what it is about YOU that makes this life even remotely appealing. Therapy, Al-Anon, something for YOU. I think I sense a theme here...