When someone hurts you, forgiveness is the only way forward. Not primarily for them, but for yourself.
The depth of the hurt correlates to the level of value given to the relationship and the amount of expectation the individuals have. The closer the relationship and higher the expectation, the deeper the hurt. This makes restoring the relationship that much more meaningful and necessary, and therefore difficult.
Any repentance and forgiveness that was quick, easy, or painless shows the shallow level of relationship and its low expectations. A repentance and forgiveness worthy of the relationship is costly and not easy at all, but it is worth it.
Don’t confuse the desire for a repaired relationship with the amount of time it takes to bring it about. The two are related, but not dependent. It may seem to happen quickly in some circumstances and slowly in others, without regard for the desire. I have a feeling that it takes longer than we initially realize; we can see it clearer when we look back upon the process. The important thing is to keep moving forward as much as it is up to you.
I’ve written a bit more about conceptual thoughts on forgiveness in this prior essay: