I graduated high school 30 years ago and still have two close friends from those days. One I've actually known since I was about 18 months old and our parents used to walk together while taking us out in our strollers. We were childhood playmates who grew into adult playmates. The other I've known since I was 14, which is 32 years. I have a few other acquaintances who were school colleagues that I keep up with through my parents, who socialize with their parents. Those are mostly "hearsay" acquaintances instead of friends.