^^What she said.
Do not expect in S/D what you did not get in your M.
He didn't tell you the truth I. Your M. He hasn't acted with integrity or honour in your M. He will not suddenly start now.
Instead of focussing on him and what he's doing/not doing start focussing on you. What are you doing to protect yourself?
It's easy for him because he detached from you even before he started cheating. This is new to you so you're reeling. I know it because I was too.
A year from now you'll read a post just like this and you'll be swinging the biggest 2x4s gently at the poster.
You'll be kicking yourself for not protecting yourself. I know I did.