There are no do-overs.
But you constantly wonder, how much different would everything be if I did or didn’t do that one thing? Would I still have my old friends? Would I have met my new ones? Would I have missed out on opportunities that I have since gotten? What did I miss because of what I chose to do? How different would my all my alternate universe selves have been? Would people have liked me better? If I didn’t do the thing, would you still have felt the same way about me? If I was different, would I still look back at the past with the same feeling? And why can’t I just let go of it like everyone tells me?