Couple of things I've picked up on that you've said...
You want your life to go back to normal - that would mean blissful ignorance and not the actual solid relationship you thought you had. He destroyed that and disrespected you by sleeping with at least two other women. Your new normal is with him gone and you getting your confidence back. You don't need him.
You want him to show some gratitude for you staying around - sorry but why are you are acting the martyr? You're not staying for his benefit but your own. Understandable because he has totally crushed you but that's on him. Don't spend your life in that vicious cycle as it will only lead to daily digs and building resentment and you will stop yourself from living the life you could have if you just find the strength and self esteem to tell him to leave.
I've read lots of posts from ppl who have experienced similar situations and there seems to be a common theme in that the men have a detachment and can compartmentalise their feelings/behaviour. He seems to be doing exactly that - he's saying what he knows you want to hear, but you are detecting the insincerity of it. It's just words because if he genuinely felt remorse you would see it more in his actions.
Let's face it he has lied to you successfully for some time - this is his MO and he isn't the upstanding family man you thought he was. So instead he is able to carry on as normal.
Don't sit around waiting for him to see the light, he won't. You are still there and that's all he needs... confirmation that you will stick around no matter what. He likely sees it as his licence to do whatever he wants so it's just a matter of time before another bit of fluff comes along.
Honestly do yourself a favour, make the break. Show him the consequences of his actions and then maybe he will think twice. But if he doesn't, it's not your time/life that he is wasting.
You deserve better