I think forgiveness is a concept completely misunderstood today.
Forgiveness does not mean to condone with bad or harmful behavior;
Forgiveness does not mean allowing abuse;
Forgiveness does not mean simply acting as something never happened ("meek as a dove, astute like a serpent")
Forgiveness does not mean cancelling the natural consequences of an act;
Forgiveness does not mean everything will be as it was before;
Forgiveness does not happen without repentance.
When we just "leave it behind" and go on with our lives despite the lack of repentance of the other person, that is still not forgiveness. It's just freeing ourselves and letting the person stay where they chose to be.
That, actually, is the iconic equivalent of God "sending" people to hell. God does not cease to be Who and What He is despite people's choices. So, in being immutably Himself, those who do not want to be with Him are left behind. God "goes on with His life" and "leave them behind". If you do that to me, at most you will loose my company. If you do that to Life and Love itself, that's hell.
Forgiveness is "merely" a meeting after being apart, a new start, that *does* take into consideration what happened, from both sides, specially to actively avoid that it happens again. From the hurt part that is forgiving, from the hurting side that is repentance.
Remember the Prodigal Son. We are so amazed by the party he gets in the end that we miss some aspects of the lesson.
First, the whole initial conversation of the younger son is horrible. Imagine a father having to hear that, his own son showing that he is interested just in his money and to be away from him. The father does not stop him from going. If someone really wants to hurt you, you don't try to keep this person near you. Actually, if someone is that ill-intended, you help the person to go, just like the father actually did give the money to the boy.
Second, the father does *not* go after him. He does not try to contact the boy, not when he was having fun, not when he was eating with the pigs. You decided what you wanted from life, you wanted me out of your life, you got it, live with it. Consequences and responsibility.
Third, the son had to take the decision of living behind the worst of the terrible life he had. He had to leave the pigsty, and walk all the way back to his father's country - actually that's equivalent to the purification phase of the ascetic practice. Only when he was already in the road to the farm does the father come to him - the illumination phase. And the party in the farm is the deified state.
The father does not give him back the lost years. The father never agreed that "it was a necessary experience for his learning". The father never said "Oh, nevermind, here's another chest of gold, go back to the city, this time things will work out fine". He implies that this time the younger son has to stay in the farm with him.
Forgiveness and repentance happen together, it's a meeting of hearts and a second beginning, never an excuse to be abused or a license to hurt others.