The secret of change is to focus all of your energy, not on fighting the old, but on building the new.
Focus your energy on the future and your own growth, not on your past and the things that may have hurt you. Old hurts are nothing but hindrances and lessons unlearned. Take what you can from them and then move forward with your life.
"The secret of change is to focus all of your energy, not on fighting the old, but on building the new." - Socrates