Nicky, It appears that your h had some "quality" time while the ow was away to work on himself and to think about life. He's having some light bulb moments or as Sting would say "sanity" moments. It's good that he feels he can come to you and talk about things. That's what he needs to continue doing. He needs to see the light on in the window and gravitate to it like a moth to a candle.
This is a part of the journey and if you go back and read some of the other success stories, you will see that their spouses have done something similiar. Accept him for who he is today, listen and validate his feelings. For these feelings are very real to him at this time. Nicky, he feels safe w/you and your little girl. Keep it that way and he'll continue to gravitate to home more and more.
Hang in there.
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.