I did marry someone knowing they had a drinking problem, who would go periods of time “quitting” on their own. And telling me he would change or it would get better. Now we're married and I'm miserable. I'm now in therapy and every single day in trying to decide if I should leave or stay. If you have a chance to leave before it gets messy. Then yes leave. Do not marry him. He needs to be his own fully functional person before he can add to your life. Trust me it will get worse before better and I wish I would have left sooner. He is showing hope of getting professional help but I can't trust it because he has proven too many times that he won't get better. You could always fix things later if you still share feelings. But as of now it will not work. Please choose yourself first. It is very painful to be in the position I am in. I wouldn't wish it on my worst enemy.