I hope counselling helps you see that one man is not your "whole life"
Especially a shit one like this.
Lovey, please don't rely on a "skilful counsellor" teasing the truth out of him. No offence to the counselling profession, but it takes a very exceptional one to pierce the sort of stonewalling denial your H is going to continue to put up. Bog standard realtionship counsellors are not eqipped to deal with that.
the Relationships board is littered with stories of men who got dragged along to counselling but still continued to lie
he will even start to believe it himself, and that's a tough nut to crack for anyone. he can nod, and cry and plead in all the right places...job done.
I think you should have individual counselling and leave him to his own devices, tbh
if he wants to prove to you his continued worthiness of trust and respect, he needs to figure out his own issues, under his own steam
whether he does that, or rides on your coat-tails (which is what he has been doing for years) will be very telling