Providence, I'm so glad you have a home base and support system to go back to! Your road won't be easy even with this in place, but it would be so much harder if you felt all alone, and so much easier for you to fall for his promises now, when nothing is really solid or known.
I agree w/the other posters that it's in your best interest to stay where you are and keep taking care of you. I was taken in more than a few times by XAH's tearful declarations that he was a "very sick person" and that he needed help. They never turned out to be more than words, and he never made more than a token effort, returning to his usual behaviors in no time.
I wish your A all the best and hope his recovery is for real. I also wish YOU success in your own recovery--sending you strength and clarity to stay the course!