Regretting something that happened is so stupid. It's done, why regret on it? It's simply ruining your life a lot more when you can forgive and forget or just simply forgive. I don't really know why though... But most people go all "emo" not meaning to be stereotypical but most destroy their lives over one stupid problem which could be solved with one click of forgiving and forgetting. So yeah, Damn regret!