It's over
Regardless of whether you stay together or not.
Many things have ended, your trust, love, peace of mind, loyalty and respect.
It's very hard continuing a life with a person who you no longer like and I'm sure you don't.
What's to like? this man purposefully did this for his own ego, not just for the sex but to get one up on you, even though the end result could be divorce, separation or a life long hatred of him.
You will find everthing hard now, if life was hard before it's going to be 100 times worse now., and not just in the short term this will affect you forever, however well you manage it.
Marriage should not be about one upmanship, only you know if you have a player on your hands and think as a pp poster said he will just become better at hiding stuff. I honestly think these men that continually cheat hate their wives and their lives and you can't fight against that.
A different mindset has to be gotten to, at the moment you are hurting and can not see anything but rage, fear, sadness and feeling unsafe but in time your thinking will become more balanced.
By the sounds of it you are still young, still much life ahead of you and if you start to open your eyes and look there are other options. You now have no obligation to this man in terms of remaining faithful, start thinking of how it would feel to have someone caring and loving you instead of thinking the person who you are with hates you.
He's not a kind man, he hurt you intentionally, why would you think someone like that would change into a nice, kind person ?
You deserve better and there is better out there, not all men behave this way.