With any physical or mental pain caused by someone you must confront mentally. You could easily try to push the pain inside the soul and try to forget about it, but that's not a good idea.
Just imagine your soul is like a balloon and the pain is the air blown in it. You can just blow and blow the air in, but the balloon isn't capable of stretching to infinity. And the same is with your soul. For sure you can try to push the pain inside yourself, but one day your soul won't be able to take in any more bad feelings. And just a little trigger will make you explode or even worse - you will become so used to the bad mood and all the negative acts regarding you, that you'll become numb. You won't be able to feel good about yourself and you will fill yourself with anger. You will start to hate everyone around you and you will need so much more time and effort to try to convince yourself to trust people again.
I think, that the hardest thing you can do when someone betrays you or even hurt you in any way is forgiveness to the people who are the reason for your pain. I know it's not right and I know even I would feel the anger towards them. But the resentment will be the worse for you and them. Ok I know, some of them are just pure evil, and their acts are unforgivable, but the majority just can't stand that someone else is happier than they are, and they feel better about them by making someone else feel bad.
Sending the loving thoughts to the individuals that hurt you in the past will make them powerless. They will not know how to get you off the track and with your response, you will definitely confuse them. You never know, but maybe they won't be so evil towards you anymore.
"So forgiveness for them and setting them free with your love is the hardest, but the best way you can go through the pain."