Recovery is so VERY SLOW!
I'd have as little contact with him as possible, let the staff tend to him and see what their recommendations are. I know my AD would try to manipulate me when she could call, and I would become weak in the knees and want to give into her when I knew that wouldn't be best. But my heart would want to get the best of me.
I'd recommend that you concentrate on working on your recovery while he's in rehab. That is THE BEST thing you can be doing right now. If you can, find an Al Anon or Nar Anon meeting in your area and attend some meetings. The best thing I ever did was add Al Anon meetings to my life. They have helped me so much and my AD is so glad I, too, learned about recovery (and am still learning) for myself.
Hugs,
Hangin' In