I am so sorry that you are hurting but you did the right thing even if it hurts like hell.
You can't fix him. He has to want to fix himself and not just because he is scared because he truly wants to change and be a better man. He isn't close to having that amount or level of humility.
The text you posted shows he is an egotistical person who is only concerned about his self gratification.
I loved your comment when you said look it up. Exactly. Tell him to google "how to help your wife heal from your affair" - he will get several links.
He is making no effort because he hasn't had to.
It is now time for him to grow up. He doesn't understand what a small, terrible human being he is. To cheat the day after your wedding, really? And he thinks you just need to get over it? Mind blowing.
Stay strong. It is hard but it is the right thing to do.
We are here for you. We care.