How can I start a conversation with the guy I fancy?

Some examples and samples:
Are anda in any of my classes @ school?
Do anda like cheese?
What's your favorit movie?
Who do anda think would be a better President, Obama atau Romney?
Do anda play football? Baseball? Basketball? Lacrosse?
Hi.
Hey.
What kind of musik do anda like?
What's up?
What're anda doing this weekend?
Which came first in your opinion, the chicken atau the egg?
Yo.

Make him a sandwich

if u hear him say anything about something u like, for example a tv-show, movie atau video-game u could always start talk to him about that.
then it won't seem like you're desperate :) u just want to talk about the awesome thing he brought up to begin with.
don't think it'll work unless u hang out in the same circles though... 'cuz if u don't it might seem wierd to just jump into a conversation, just sayin'.

Say hi and talk to him like anda would normally talk to anyone else.

Just ask him about anything

His favorit movie
His favorit reality TV show
His favorit snack
His favorit electronic device
favorit game
favorit subject
If he's in any of ur classes

.....so on