Yo gal.... itz the 21st century.... or 22nd?? Nevermind tat, just use our methods on how to chase gals loh. Use many stunts and patterns lah, not too aggressive though, guys will get freaked out.
But first of all, u need to be friends with this guy first, then go up the ladder to be his very good friend, from there, u can start ur assualt. Yo, word of warning, no stalking also, he'll think tat u r crazy and everything will go down the drain.
U dun have to confess verbally to him, just show him how enjoyable if he is with u (obviously not sex, too early for tat). Have the initiative ask him out. Too embarass to ask directly?? Use an excuse, works for me...

Guys give off hints too, so lookout for tat. I dunno about gals but, IMO, they mostly can catch those hints.
If u r able to hook him, the rest is up to u whether u wan to maintain it, or dump it down the drain.