golf mom, Sounds to me like he's trying so darn hard to convince his sons that it's okay to be divorced and yes, he's projecting his "crap" on to you. He's the one that needs his head checked out by a professional, not you.
Golf mom, continue reassuring your children that everything will be okay no matter what. Your children need to know that you are the stable parent and will always be there for them.
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.