Help

It's been almost 2 years since we ended. He cheated on me and left me for someone better. I can't move on. It has been affecting my day to day life. I used to be a really bright student. But the sadness keeps coming back and makes me cry. I don't know how to move on. Men scare me too, so dating isn't an option. I tried hobbies and tried being busy. But it keeps coming back. The trauma of being left for someone else keeps haunting me. Help me. Save me bc i can't save myself