He cheated on you. You’re mad. But why are you more mad at the other person? She did not cheat on you, your man did. She was not the one who was supposedly committed to you, he was. The fact that you’re even defending him from her is something I cannot stomach. Is it a form of defense? Is it something you do to try to deal with the betrayal? Because if so, wake up. You can’t always let someone step on you like that. Bottom line is that you got cheated on. It doesn’t matter what, how, where and with who. You got cheated on. That should be more than enough to make you realize you deserve better. Pretending is only going to make you look stupid. Obviously, you have wasted too much time and effort on the wrong person.