Yeah that would get kinda awkward. I know one girl in my class from pharmacy school who knew this girl I met in high school. They had been in the same sorority, and the girl from high school would talk about her friend who was going to my school for pharmacy. Well, I added her friend on facebook, and met her few days later. It wasn't very awkward at all, because we had mutual friends and I could talk to her about something.
I know
another girl I used to talk to on AIM and Xanga when I was in high school.
She knew my friends from high school and all-region band, so we all talked to each other.
My best friend was from that all-region band, and I got to talk to some of
her friends on AIM. I met
one of her friends who was a lifeguard in my hometown. It didn't seem so awkward because we also had many mutual friends, and
she was prettier than I thought
she would be
👍 
Anyway, that
other girl lives in a different county, and I still haven't met
her, but
she knows some people from my undergrad that went to high school with
her. So when I asked my friends in undergrad about
that girl, they knew
her and they would talk to
her about me sometimes.
Let me know if it's still confusing