Wait I'm sensing a new stronger you emerging from your shell. It sounds like you have had a breakthrough.
Is it your kids that you need to "prove" that you tried everything to? If so - let it go, they will understand when they are older.
As regards individual counselling, yes definitely go, especially if he's paying, because you can use that as a tool to further discover and strengthen yourself.
But I really wouldn't agree to couples counselling.
TBH my experience of couples counselling was not very good with my H. And he wasn't even abusive, just a bit shit.
The counsellor started us off with the expected "Tell us some things you admire about your partner."
I started off saying how I admired my H for creating the first UK male abuse survivors group, for being open and honest and helping other people, for keeping it together when his ex left and raising their son alone, on always being helpful and kind to others in need.
Then he turned to me and said "Well the thing is pockets is dead good at reading an writing an that so when there's any letters to write, I let her do it."
Two days later I called the counsellor and said cancel the rest of the sessions...