Correct me if I'm wrong here, but I thought she was just a live-in girlfriend, not a wife?
AS for the drinking - yes, of course YOU are responsible for the decision to drink again. But nonetheless, I don't think much of a woman who knows you are in AA, who doesn't at least refuse to drink with you. If I was dating a sober alcoholic, no WAY would I drink with him. If he wanted to drink with me, I'd kick his butt back to AA meetings! That's what a SUPPORTIVE partner of someone in recovery would do.
That, and her poor parenting skills, are what makes me think she really wasn't a good match. If those close to you are saying the same thing - and they have a lot more information that I do - I would take their word for it.