I had always assumed I was unpopular. I was in the group with the non-popular smart kids. Most of us were in band, so we were social, but we weren't in student government or go to dances or anything. Only 1 of us went to prom and it was cause she had a boyfriend for like 4 years.
A few years ago I went to my 20th HS reunion. Some people didn't remember me, but A LOT of people came up and talked to me who, I swear, never spoke to me once in high school. I told my dad later, and he said he thought I was very popular. I told him he was full of it.
Though, it's true, since my dad taught at our school, everyone knew who I was, but that's not how I would define 'popular.'
In the last couple months TONS of people I barely, or do not remember at all, from high school have friended me on fb. I don't know if that's because they remember me fondly, or simply see me connected to other friends from high school and vaguely remember my name because of who my father is.