Okay so he said he doesn't feel anything anymore. If I could have a nickel for all the times my H said that to me, I would be rich!
In his mind he might feel that right now. They stuff their feeling for us deep inside so they don't have to deal with it.
IMO, I wouldn't mention D anymore. I would not volunteer to file. If it does come down to it let him do all the work. You don't want this.
I would talk to the C about you kids and telling H how they feel. Yes their feelings are very important.
This is my feelings. I would go dim for a while and not contact him. Let him miss you and the kids. I did this and it did take a while. My H felt less pressure and then didn't feel like I was chasing him anymore. After his MLC he did tell me that he got really scared that he was going to loose me. So I guess it did spark something in him.
Like I have always said each person it different, each MLC is different. You need to do what is right for your sitch.