You are in a tough situation, and making some very tough decisions with great courage.
I'd encourage you to NOT see him and NOT let him help you Sunday when you move. This is the start of your new life, and far better that you start it without him on your own steam.
For me, having had to see my abusive XAH because of property we own together and need to sell, it kicks me backwards emotionally every time. Just isn't worth it.
Take care of you and your kids, and good luck
ShootingStar1