All people make mistakes. On occasion, a choice we make might hurt someone's feelings. Hopefully, we are remorseful and apologize and do whatever is necessary to make amends. But, have you ever been in a situation where after your error, you apologize, and do everything to make amends to find that the other person(s) involved won't forgive you? They are just not ready to let it go.
Often times those situations are the most painful because you need to move on. You have done all that you can and to the other person, it is just not enough. What then?
Some may feel that is when you turn it over to your Higher Power while others may make a conscious decision to allow themselves freedom from it.
This may also be the time when you have to supply the forgiveness, even if you don't feel you are the one obligated to do so. Forgiveness is not about letting another person "off the hook." Forgiveness is really for you. Forgiveness is freedom for you.
Remember if you really have done everything you can to right a wrong and it is not being received, that's all you have to do. It's all you can do.
Being the best you is enough.