I have been reading along. Your MC sounds as though she knows what is what and it will be interesting where she may take you as a couple.
Piecing is a two person thing as you can obviously see. If your H won't participate then that will be his loss. I am pleased to see how strong you are and I hope the MC re-enforces your decisions - whichever way they go. No-one can say you haven't tried.
Like June, I was pleased when my parents split - I couldn't stand the tension and arguing. My father expected my mother to live exactly as HE wanted - there was no OP involved but he was one controlling SOB with a huge drinking problem. I respect my mother enormously for how she brought my sister and I up; she saved us by walking away from her M. Some marriages are toxic. Like you she gave it a good go, and then she called it a day. I believe happy parents raise happy children -whether they be together or separated. I believe in M, it's why I fought so hard to save my own; but not at the expense of everything.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength