My 20 year reunion will be in a few years, but one of the first things I did when I graduated was unfriend the two people who were the alumni organizers. I haven't heard from them since a few months after when a friend of friend asked me for something and I ignored them.

I haven't spoken to anyone from highschool since 2 years after graduation.

I had friends from extra curricular activities and some of them are still my closest friends. But I really did not fit well in my school.