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.