Most of the things I do not mention to other people refer to me and I have no desire to tell them to anyone. Does that make them secrets? Perhaps not, as calling something a secret suggests that it is something you would talk about if you could.
Once in the heat of the moment I did tell a good friend something that proved in the longer term to be trivial. I was un able to forget it, because she had the knowledge I had given her and thought it important to me. I was stuck, because if I said anything, even to tell her the event was trivial, The fact that I needed to tell her that would only emphasise its importance.
I was deeply distressed wen she died suddenmt a few years later, but gave a sigh of relief that a piece of trivial information could be disposed of.