Welcome!
Have a read through some of the sticky posts at the top of the forum - they are a mine of information and experiences. You are not alone in going through this.
I'd also recommend reading 'Under the Influence' and 'Co-dependent No More' - both these books really helped me see what was really happening in my relationship with my XAH. I think you might find them useful too.
Ana, do you think you would be able to help him if you stayed? Do you know the three C's? You didn't cause it, you can't control it and you cannot cure his alcoholism. Stay or go, only he can decide when he has had enough and puts the bottle down. He may never do. He needs to want to help himself and it doesn't sound like he's anywhere ready for that. Are you taking good care of yourself in all this?