Welcome, I would also suggest that you read Codependent No More, the stickeys at the top of all the Family & Frins Forums and cynical one's blogs. A wealth of information at your fingertips.
Meetings would also help, there is a reason that you keep choosing unavailable toxic men, it doesn't just happen. Perhaps, if you dig deeper you might find the answer so that you do not continue to repeat your choices.
As for him, he has a disease that has no cure, it is only a matter of whether he is clean and sober, working a strong recovery program for life or not. This disease, left untreated will progress, it is one nasty disease that has tenacles that affect everyone it comes in contact with...and...not in a positive way.
Work on you, get healthy, for you...that is really all you can do...save yourself.