How do I truly move on

I had a falling out with someone I used to be friends with, and I was actually going to be in her wedding. Not to mention the falling out also had to do with the fact that she had set me up with one of her guy friends and he cheated on me. It was all a mess, and it was hard, especially considering the fact that we had these plans for me to be in her wedding, and I was dating one of her friends that she set me up with, and he cheated on me, she knew about it, and didn’t console me or check up on me to see if I was okay, and basically defended him, as well as turning the entire situation back on me saying it was my fault and I was to blame. I think about it sometimes but I think my anxiety gets the best of me and it causes me to rethink it. How do I fully move on and get passed it.