OK Confused, you're back with an alcoholic. The sober wife is gone. Put aside your own 'sins' and bring it back to basics; you don't want to be married to an alcoholic.
No doubt she'll throw the affair in your face, and that's fair enough, but the main reason you joined this forum was that you couldn't take the alcoholism any more. At least now, you know where you stand. Please don't let guilt about the affair stop you seeing the way forward.