"Abandon the idea that you will forever be the victim of the things that have happened to you. Choose to be a victor." (Seth Adam Smith)
Brian Tracy recommends that if you want to be happy in life, you have to stop the blame game. Blame requires negative emotions; it will drag you down. Just one negative emotion can sabotage your happiness. That's not to say that your anger is not legitimate, that you have no reason to be unhappy. I had a good reason to feel betrayed. However, if I had continued to feel sorry for myself, I would have hurt no one but me. One day it hit me like a ton of bricks: It's not my job to judge her, it's God's job. I was able to forgive her. A gigantic burden was lifted off my shoulders.
As Seth Adam Smith advises: "Abandon the idea that you will forever be the victim of the things that have happened to you. Choose to be a victor." You can't control everything that happens to you. You will run up against obstacles, against injustice, against evil. But you can control your reaction to it. Say to yourself: "I am responsible for my own happiness." Don't let anything stand in the way of your goals. Let it go.
Note: Read The Secret of Letting Go by Guy Finley at https://www.amazon.com/Secret-Letting-Go-Guy-Finley/dp/0738711985.