The central act of forgiveness and the one that indicates spiritual maturity in every case without exception is the forgiveness of the parents. The reason that we can’t forgive is that we don’t want to face the rage and pain, to admit what really happened.
The truth is that one must experience in full the pain of the actual harm that was done. That’s the block for most people. It has to be gone through again and again, and layer after layer has to come up.