You are not alone.
There are several sites where people have asked the question: “How does Facebook choose its suggested friends?”
The question was posed to members of a Reddit thread and their theoretical answers are making us regret every stalk we’ve ever made.
Congratulations! You’re being Facebook stalked!
“I think if people look you up on Facebook then it starts suggesting them to you,” one user said.
“I had a situation like this with a girl from college. She started appearing in my suggested friends. We have no mutual friends, don’t live near each other and I didn’t have anything about college on my Facebook but she still was showing up there.”
You’ve got their number.
“If their number is in your phone, and they have their number linked to their account, they might show up as suggested friends. Has happened to me a few times.”
“FB may use other things, such as various 3rd party cookies, macromedia cookies, and even such creepy things as Canvas fingerprinting.”
Canvas fingerprinting is not a fun holiday idea to do with the kids but a technique browsers can use to track online users as they move between sites.
The dating app link.
“I had my Facebook linked to my OkCupid to get pictures and FB started suggesting I friend all the guys I had been messaging. ”
Email. Remember that ol’ guy?
“Lately, this girl I was in a study group with TWO YEARS AGO and only ever talked to through email has been popping up pretty high on my suggestions.”