What is happening? I think your husband's email is a very good sign. I think Just_Me's advice sounds really good. He has been where you are and had success. Read his posts during this period in his relationship that is now similar to yours. I know he didn't jump right back into things.
Can you call a DBing coach just this once? I think it is OK to tell your husband that you need to think about things but then again, I don't like giving advice on your situation right now. I think professional help is best. Problem is that a lot of therapists that I have been too in person stink at marital counseling. Can you shell out the money for a phone consult with a DBing coach? I think they are best at marital problems. I have had two phone consults. The first one was Vernetta and she was great. The second one I didn't like too much, but I won't say who it was. I think he might have been having a bad day. Vernetta has a long waitlist, but I think it is because she is so good. I think telling ex you need time to think about things and then waiting for a consult could be a good plan. Shoot, I don't really know. This stuff is hard. Best wishes and good luck. Keep us informed. You are giving others hope!