Everyone has a moment or multiple moments they would love to experience again, but there are also moments you deeply regret and want to forget. For instance, like accidentally breaking a window or maybe being growled off for being too loud or annoying. However, some bad memories might be a reason why you are you! Same thing goes for good memories. Items can also cause small but important memories, like matches to light the candles in Church. Or a lavalava to wear at a family gathering.
Of course you can’t change the past. You can only decide your future, as in what qualities you will use to achieve your dream. As in maturity, intelligence, optimism, working hard and all other positive qualities as well. Its okay to have bad memories, its just apart of life.