Misread the title with my first comment. Something I’m not particularly nostalgic about is school. I’m grateful for some of things that I learned, but my memories are not fond enough to want to repeat or relive any of it and I definitely wouldn’t go to any sort of reunion. All of that is just way behind even it hasn’t been a decade yet, I’m just over it with not much to reminiscence about.
r/IWantOut has some pretty good resources, OP.