Relationship damage

I think it depends on what you did to damage it.   If it was something unintentional and you've apologised and shown that person that you'll try hard not to do whatever it was again, then that person might forgive you and you can both move on in a healthy way.

If it was intentional, then well, I guess you could apologise and try to work through it, but if that other person is really hurt and doesn't feel like they can forgive you, then I guess it's their prerogative whether they want to salvage the friendship/relationship.

I don't think I've ever intentionally damaged a friendship or a relationship, but I have been in a very toxic/abusive relationship and unfortunately, that relationship was not worth continuing.   Although we do have a son together, so I still have to see him occasionally.

Yeah, I do it often. Sometimes intentionally. Most of the time not.

If I have a friend that has been hurtful behind my back, then I will go out of my way to destroy every last ounce of the friendship. But then I'm like that in the sense of "I don't need people like that in my life and I'm going to make sure they know it!"
Obviously in this instance I make no effort whatsoever to reconcile. Once a traitor, always a traitor in my mind.
Makes me sound like a bad person huh?

For those I have messed up accidently, whether it be by something I have said or something I have done. I always apologise and explain myself without trying to make excuses. Then I take the time to tread carefully and repair the relationship piece by piece and I handle it all very delicately for a very long time.