Truly forgiving someone for any pain they have caused you is the very best step you can take in helping yourself to let go of past hurts. Sit down by yourself in a quiet place and think over each hurt that you remember (don't try to make yourself feel pain over it). Then say to yourself "I forgive you for this pain. I now intend to forget it." You need to really mean it when you say "I forgive you". You will feel a great peace when you have truly forgiven the person and you will have made a good start to moving on with your life. Once you have forgiven them for past hurts, it is more difficult for them to try and hurt you in the present, because you will have already started moving "away" from them and they will have less of a hold on you. With less of a hold, it is more difficult for them to inflict further pain.