I'm new to this also, but I can tell you if I had known of my H's problem before we married, I wouldn't have married him. Throughout our first 6 years I was given several promises to quit and to seek help. He would stop for 2 weeks and then back on again. I've threatened to leave and not come back, but that's all they have been, threats. I have left twice for overnight stays at friends houses. The first time he stopped for a few weeks, the 2nd time he could have cared less.
On a more positive note, my H's cousin was also an alcoholic plus a drug user. His fiance refused to marry him until he was clean and sober. That engagement lasted for 9 years. He lapsed a few times after marriage but she was always there. He has been clean and sober now for 2 years straight. They have been married 8. He is a counselor for a rehab center in FL and loves it. Things couldn't be better for them.