Sorry to hear that things have regressed for you SP1. All I would say is dont feel defeated by this setback. Keep the faith and keep Dbing, as it is a constant effort. I have know way of knowing to what level your husband has been drinking, but substance abuse of any kind makes the process infinitely difficult. Without putting him on the defensive (ie., why are you so withdrawn?) ask him if there is a specific thing that has been bothering him lately. Maybe it's work related or something that he has wanted to talk to you about but cant seem to find the right opening.
Good luck with everything, and stay positive! that's the important thing!