Regrets:/

Have you ever regretted something you knew you couldn't take back? If I could take back what I had done I honestly don't know what I would change... The reason why? How I did it? If I would have even tried something different? Or completely ignore the whole situation? Idk but I regret that night more than anything. What I do know is talking about it isn't going to solve anything... I guess I have to change myself since I cant change you or what I had done and I know exactly how to do that:) hopefully.