busting, I'm glad you came back and posted an update. How do the kids like school thus far? Plenty of homework?
Busting, what you are feeling right now about trusting your h is very normal. He's got to earn your trust and the only way to do that is to be open and honest about what he's doing w/his life (all aspects) and it sounds like he's not completely there yet.
From what you posted, he's still not fully baked and he's got a ways to go, but things are progressing slowly, but surely. Dig deeper for patience and allow him to continue to come to you. I know you want him back in your life as your h, but he's not there yet. Dig deeper for patience and continue to think positive.
I think you are doing well. Keep the focus on you and your children. Enjoy your party this evening.
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.