Wow, I can't add much to the wisdom already expressed here on this thread.
One of the things that struck me was what SeriousKarma wrote--the realization that it isn't ALL about the alcoholism. Leaving a relationship, no matter how right a thing it was to do, is similar to a "geographic cure," something a lot of alcoholics do before they are ready to quit drinking. We are still stuck with ourselves. So if we want good company on our future journey, we need to make our lives as good as they can be.
I've been on a dating/relationship hiatus for nine years now. My life still isn't exactly what I'd like it to be, but everything good or bad about it is on me. Maybe someday I will be ready to get involved with someone new, but for now I don't need the complications. It's been an interesting (if sometimes disconcerting) experience getting to know me. I didn't know how to be just with myself.