Should I tell this girl I like her?

[eagerrabbit525]

Okay, so there is this gorgeous girl I've had a crush on for as long as I can remember in my class in high school(we are both seniors and she sits at my table. It's an art class.) I have been trying to see if she is in anyway attracted to me or interested in me but she doesn't do anything or act a certain way towards me that would make me think she likes me back. She is a very outgoing person and she just recently ended it with some guy who turned out to be an ahole to her a few weeks ago. I consider myself to be an average or a little below average looking guy. I do not think she likes me at all but I just can't help but find her extremely cute, when she talks to me all I can think of is how beautiful she is. I have had only one girlfriend in my life(im 18) and we dated for a little under two years, but she was the one who initiated conversation with me on fb and we moved on from there. In this case, I don't think the girl is interested in me that way but it's not like I've been rejected by her, right? Do you think I possibly have a chance with this girl and should just tell her how I feel about her and risk it being awkward for the rest of the year or just accept that I don't really have a chance with her and just remain friends? Oh and there are also people who sit on both sides of me but sometimes one is not there and she would move to the chair next to me so she could talk quietly and not attract attention. We sit at a square table and we are both in a corner.