It is terribly hard to forget a haunted memory like this. I know exactly what is feels like....you get so angry and raged, it sucks. What I would do is, (this may not be the best to do,) but just curse this person out and get all your frustration out. It may be only temporary but eventually you'll start to feel better. If you shoot guns, shoot their picture or burn it in a fire. It may sound psychopathic but it helps.
Ana15