meself, scientists tell us that in order to keep some memories for a long time we access them so often that we usually change the details of the events. And that every single person has their own view of events, so as someone noted, an event the first person felt bad about the second person didn't even remember. I think I've let go of most of those things that used to bug me, but they're in the back of my mind and if an occasion arises to discuss it with the party in question, I might.
Meanwhile, it's all fodder for creative purposes, poems, songs, stories, screenplays . . .
When the writer Pat Conroy was sitting at his dying mother's bedside, she remarked to him that she was concerned that anything they might be talking about would end up in one of his plays or novels. (It later did.)