Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...

I'm sorry you are going through this. It is hard, for sure. But, you are going to make it.
Since he has chosen (yes, he made the choice) to do this, then you NOW need to take actions. Don't wait around for him, or expect an apology. Go to a divorce attorney. They do free consultations, and you can do it by phone. Find out from an attorney what your next step is.
It's terrible what he chose to do, but you still have your life to live. You can't wait around for him to act a certain way. He is already gone. As hard as it is, separate the emotions from what you need to get taken care of. Financial maters, living arrangements, house, support payments... things that need to be taken care of. Talk to a divorce lawyer and get the ball rolling.
Once you start taking actions toward helping YOU, you are going to start feeling a lot better, a lot stronger, and you will feel more in control of your life.
You are a young woman and you will go on to have a happier, much better life, with someone else (someday, when you are ready).
Take care of YOU now. Don't worry about him or what he says or doesn't say. It's about time that you looked out for you now. You are not the one that ruined the marriage. You did nothing wrong. None of this is your fault. He made these choices, so he will have to live with them.
You're right. Don't text or call him anymore. He doesn't care. But he'll care plenty when he gets served the divorce papers. You are entitled to financial support, half the house, maybe even half of his retirement account... all things that you are going to need to live off of. Contact an attorney and get things going for yourself!
You are going to be okay.
My guess is that any conversation with him would just cause you more pain.
You will get through this.. happiness is possible. There is better life out there
The answer to that is simple, Your not to blame, he is. In my book, cheaters will always cheat or at least think about it.
Turn him loose, if he comes back make sure it's on your terms.
We are here for you, your not alone.