i just can't do it anymore.

why. why do I keep falling for him again and again and again? he's just my best friend. he has to like someone else right? he'll never like me. but why. whenever he looks at me, I get a strange feeling in my heart. but he called me ugly once. my heart hurts, even if he only said that in the heat of the moment. but he likes another girl. she sits right next to me. she's so smart, slim, not too tall but not too short, quite fit and nothing like me. I'm a subject monitor, and he works with me. butterflies flutter in me whenever he thanks me or compliments me. I know that I may be too young for this, but I can't help it. he's too attractive. but I'll never stand a chance, will I? he rejected me once last year, but I can't help but like him.
Do you think I have a chance?