I think because she'll get used to being freinds with you, and only friends with you...but if you only know her for a little while, you can still make an impression of you being something else to her.
He he he...I oughta try these things out......but then again, if I do, and it goes wrong well...nearly everyone in my year knows me so...it'll spread like a wildfire...
Be sure too keep us updated then eh. Never forget about your fellow forums members when commiting acts of stupidity. J/K flirtin is easy. Especially in school. Touching is half of it right there.