Your H doesn't have to change at all, and it looks like he hasn't changed much if anything about himself. Among other things, it looks like he wants you to change, even though he cheated.
He's blaming the wrong person for his As. He cheated because of his own issues, not because of any issues with you or your M. He doesn't get that. That's very negative for R.
His not answering questions means he's protecting himself and his own dysfunctions. It means he doesn't want to change - and that's very negative for R.
He needs to change only 1) if he wants to R; 2) if you set requirements for R; or 3) or he wants to change from cheater to good partner.
So my advice is to set requirements for R - and I mean 'requirements': if he doesn't meet them, you D.
Common requirements include
NC - no contact with ap; if ap initiates contact, report to BS and together decide how to respond
Honesty - WS answers BS's questions when they're asked, although sometimes a break is necessary, sometimes an answer is best deferred to MC session, etc., but his new rule has to be 'no more lies.'
Transparency - BS has passwords to e-mail, voice-mail, phones, social media, etc.; WS keeps BS informed of whereabouts, activities, and companions at all times
IC for WS - to change from betrayer to good partner, with signed release that enables C to talk with BS about WS's goals and progress (so the BS can make sure WS's IC isn't being lied to).
IC for BS - for support
MC - to help communications between the partners
Some (Most?) people have individual requirements - for example, my W had to arrange dates for us on a weekly basis.
*****
Answering questions is crucial. Every truthful answer builds trust - very slowly; Every truthful answer builds bonds.
Every question is an opportunity to step up.
Every question is an opportunity for the WS to take responsibility for his actions.
Every question is a test - if he steps up, it's positive for R; if he doesn't, it's negative. You keep score - and D if he doesn't step up.
*****
To R, you heal you; he heals him; together you heal your M.
At this point, he seems happy with himself, but that doesn't need to keep you from healing on your own. Like others, I urge you to do that - you may or may not be able to R, but you certainly can heal and move on.
At this point, your H isn't a good candidate for R. That may change. If you set requirements and show that he has to meet them or D, he may decide to take responsibility for himself.
*****
I recommend setting requirements quickly - if he's having any sort of A with a subordinate, he's very vulnerable, IMO.
[This message edited by sisoon at 12:42 PM, October 21st (Monday)]