That sucks, I was once in a situation where I held a grudge against a person for a very long time, to the point where I thought about them and what they did almost every waking moment. It made it really hard to move on with my life. What did it for me was forgiving the person in my own mind, truly forgiving them. It didn't happen overnight but it made all the difference in the world. Later on I bumped into learntoforgive.com and found that their methodology was exactly what I intuitively did to forgive in my case, I took notes on their process, hopefully they'll help you: https://docs.google.com/document/d/13w3d4a-e460yQV2y48iUVmBy...