Lost contact with everyone bar 1 from Primary school and barely see that person but rate him as a mate.
I have lost contact with almost everyone from High school.
meh good riddance. (ok 98% good riddance).
I have lost contact with most people from Uni, wouldn't mind talking to them again.
I have lost contact with almost all workmates.
However I have kept a few friends, probably the longest has been since 2002.
Wife has kept contact with her high school best friend. But so many of their gatherings are "show".
I am finding it's better to get iwth the "characters" the strange people and the unusual. They are far more interesting.