My H is a people pleaser and really good at the chameleon mask.
My XWH is a covert narc, and I understand the chameleon mask. I used to think he was a people pleaser until I started doing some investigating on narcissistic abuse, and taking a long, hard look at what my XWH had done during the M. He wasn't a people pleaser - he was a Mr. Fields pleaser. He'd say about anything to make you think he was agreeing with you but would fuzz the words just enough (narcs are good at word salad) where it was really lying by omission and/or gaslighting.
But he has lied, minimized, denied and manipulated me in order to not have to be fully accountable.
This is emotional abuse. He won't allow you to have information needed in order to make an informed decision on what to do. He has removed your agency. Has he thought of his actions as abusive? I don't know if that would be a wake up call for him.
And you're right that there's no excuse for an A. He could have chosen to do a million other things, but he selfishly picked himself over you.
Has he read How To Help Your Spouse Heal After Your Affair by Linda MacDonald or Not Just Friends by Dr. Shirley Glass? MacDonald's book has a nice blueprint for waywards to get started on their journey and tells the wayward they need to be very empathetic. Dr. Glass' book has a chapter on windows and walls that is helpful in understanding boundaries. You build windows (transparency) with your spouse, but you build walls (safeguards) to keep others out of the M.
If he's 1000% sincere and does the work, things can turn around. We have examples of that here, so I don't want to be a total downer for your holiday. It takes a lot of work and time.
The emotional rollercoaster is a something that we mention. Right now, you feel numb, which could be a trauma response. Tomorrow, you may be madder than mad or curled up bawling on your bathroom floor. It's all normal.
BW M 34years, Dday 1: March 2018, Dday 2: August 2019, D final 2/25/21