Be glad she is out of your life. Smile that she won't have the opportunity to hurt you again. Learn from the experience! And know there will be others. Probably more than one. Like many things people come people go and people will hurt you. And you will hurt others, intentional or not. At fault or not. I know the pain. Words don't help really. At least not in this moment. But there are so many moments ahead of you. The sooner you shake it off the sooner you can enjoy those moments! And just know, karma is a bitch. It may take a while but things have a way of coming back around! I've seen it so much over the years.
Good luck guardian. Killing video game things helps :)