He already has a GF!!!!?

If you have answered my questions or looked @ my profile u kno i really have a thing for this guy sam whos 2 years older, and I just found out he has a gf!!! :( i cant seem to get over him and i was wondering if you thiught it was ok if i likes him~from afar that is! i really have feelings for him, and he'll be going to a new school and there are only 4 days left of school. Is this ok?