Often we can't forget hurt. When you allow hurt to remain within you, it grows inside like a bacterial infection. It poisons your entire living. You breathe with that hurt. Suddenly, you feel the energy in your life is gone.
Hurt kills you. Kill hurt before it kills you.
Become egoless. You will forget the spelling of hurt. Only ego hurts. Drop your ego. You are a worthless creature who came into this world naked, penniless, and ignorant. So from where have you gathered your ego ? Destroy your ego. Don't feel hurt again.
Move away from people who hurt you. They are not worth your importance. Let bygones be bygones.