How to start talking to this girl on facebook?

[UKforever]

just ask whats up

[Fanaticalrock749]

Just ask, "Hey, I'm sorry, do I happen to know you?" She'll respond and you can begin a conversation.

[Merrypet015]

well since uve never seen her before its not like ur gonna come to school the next day, and itll be super awk if u dont "impress her"
Just start off the convo with a simple, hey do i know u?
and go from there, if she says no idk u, say well u should hmu sometime u look like a sweet girl

[snowcrisp]

message her. or go on chat then say oops clicked on the wrong person. from there, you can start a conversation

[ThePinestr]

start the conversation first, like hi or whats up. then go from there