Here's where you start. In AlAnon. You need the experience, strength, and hope that are in those rooms to help you in this situation.
There is nothing you can do to help him get sober. It is up to him. The A may talk about wanting to be sober, but until he surrenders and actually seeks help it's just talk. He says he has a problem, and wants you to stay with him, but he continues to drink. Why is he against AA or support groups? Most A's are against AA etc because they're not ready to face themselves.
The only person you can help in this situation is you. Read all you can, go to AlAnon, post here. (((hugs)))