Forgiveness is NOT restoring a relationship or making what they did okay. 
Forgiveness IS Releasing them, letting go of the tug of war rope, deciding to not give any more of your energy to them or to the problem they caused. It's cutting the cord. Letting go of any expectation of them to understand the pain they caused or to say sorry. Realizing how you can take back your power and energy in this way, so that nothing anyone can do or say will affect you any longer.