Have you had a chance to read thru some of the stickies at the top of the page yet? I'd suggest checking out this thread:
http://www.soberrecovery.com/forums/...l-problem.html It's very pertinent to where you are right now, I think.
There is a saying in Alanon: Nothing changes if nothing changes. And back when you posted that your A had "stopped drinking" but had made no other plans and was involved in no program for support, some members mentioned that unfortunately his "sobriety"was not likely to last long unless other changes were made besides his not drinking. Sadly, that is indeed what happened--nothing changed, and so nothing changed.
Have you looked into Alanon, Celebrate Recovery or any other recovery group for support for yourself? As Sungrl and Refiner said, there is nothing to be gained by continuing to analyze his behavior. Your best bet is to read as much as you can here (and then you'll know if others have experienced what you are going thru) as well as look for some face-to-face support for yourself. Educate yourself about alcoholism and you'll start to have a clearer picture of what you can and can't do about it--and even more important, who you can and can't do it for...
Sorry to hear that you're going down the same trail as so many others, but you are NOT alone. Read, learn, and grow. You CAN do this.