Mags, good for you for taking care of yourself first. If I were you I'd keep going to therapy and let him work on himself. Of course be encouraging and tell him you're proud of what he''s doing but try to be hands off for a little while. When my BF came back from rehab I gave him the space he needed to process things, but let him know I was there if he needed to talk. Give him time and be careful not to jump back into a relationship with him too quickly, if at all. He's going to have to put all his energy toward getting better.
I am no expert, and my BF is going back to treatment, so feel free to take what I say with a grain of salt. Haha Good luck to you both.