As long as you do not push and/or expect something from him, you will be okay. As long as he feels safe and relaxed, that's a good sign.
It's very difficult when they begin reconnecting and come around and do things, etc., for the lbs tends to "hop on the band wagon" and begin pushing and/or expecting things, not realizing that this will push them back in the other direction.
If you can continue as you have been, things should continue to progress.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
