I don't know how much help I'll be since I've never been in a similar situation, but maybe you two should just take a break until the divorce is final. I know it will be hard for the both of you, but situations like that can get pretty messy very quickly. Step away from the relationship so you can give him time to sort out his feelings, and you can have some time to breathe and distance yourself from the chaotic situation.

I'm sure someone else has better advice, but that's the best I can come up with. Good luck to both of you.