Trusting, One day at a time! Sounds like the new man in your life is going to be great w/your children and that's what counts right now!
As for your xh, grab a seat on the curb and watch him and his parade zoom by. I suspect he's going to drive you crazy w/kindness and be contacting you every time he has an excuse. Poor man! His loss, someone else's gain.
Have fun at the party!
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.