Gonna get abit deep here; I think you can 'get over' anything if you draw a line under the past and learn the art of forgiveness.
If you understand that just because one person has mistreated you, it is their fault, not everyone else's fault, so you should just blame them.
I remember being in a relationship with a girl, and in the first 2/3 months had real trust issues, which came to a head when we were with a group socialising with others. She basically implied because she had been cheated on before that I would do the same, which led to an arguement, and me walking off. We were together for just under 3 years and alot of it was awesome, and both of us would have missed out on that good times if she hadn't realised that I was not her ex.
Ironically towards the end of our relationship, which was messy, there were accusations of her cheating on me.
For a few months I was ****ed off.
But then started reading my personal development books, and decided that regardless of whether she did or didn't, I would forgive her anyway.
And I'd forgive those who have bullied me, beaten me up.
More importantly, I'd forgive myself of all the bad, morally wrong and pure hateful things that I had done in the past.
The past was yesterday.
Don't live by what happened then, live by what you want to achieve in the future.
Some of the people that have gone down in history as being truely fulfilled released all the hateful feelings they had and never judged others based on their previous experiances.
There's a motivational speaker called Charlie Plumb who was a POW in Vietnam for 6 years and spent a few years in solitary confinment, was regularly beaten up and tortured. And his message is all about peace and forgiveness.
Hatred is a consuming emotion that serve's very little use.
Use pain to make you stronger and more loving.