Just be confident bro
It's normal to be nervous/scared. If you can overcome that obstacle and just talk to her as a friend or something, it'll go fine (if she likes you :X).
Fuck what other people think. Just do you man.
And take my previous post from experience..I started chatting with this girl in my HS class on FB. She fucking loved having conversations with me. Then I saw her the next day and we were all like "uhm..hey.." and shit lol it's too awkward bro.