Most Helpful Girl
I don't think she is interested because if she was she probably would've wanted to talk to you a long time ago before. sorry I mean there's somebody out there better for you.
Most Helpful Guy
Tbh probably not She probably saw your account and was like "oh he goes to my school" and followed you. But it's not too late start talking to her
Start liking her post (not all of them)
start posting some things she post to make it look like you have a lot in common
she will start liking your post
and you could reply "thank you"
and go from there. soon enough one of you will feel comfortable enough to break the ice and then you could tell her how you feel