dating older guys isn't a good idea..
i don't see why its a bad idea... every guy i've dated has been 2-3 years older than myself.
I think older guys give you a sense of security and are more esablished in life. atm guys my age are poor struggling students like myself, and the stress of school and a bf who has the same problems can pile up
cause as much as you want to see them you both have exams and approaching deadlines, it strains a relationship from what I've seen from my friends around me.
anywho~ i think once you enter college his view of you can change, but its still vague take advantage of your "sister" role and go out for dinner with him, snatch up every opprutunity to get to know him better
and eventually tell him how you feel. The moment you tell him you like him that way he won't be seeing you as his little sister anymore