I think I have this crush on this guy, I'm VERY shy and just dont know how to approach him. Help,?

He is in my grade, I am a senior in high school, about to graduate in a week and a half, and the time is ticking for me.. the wierd thing is that i've never really noticed him until now. he has been in some of my cles through out the years and ive never really spoken to him, i feel as though we are totally different and may have nothing in common at all, i talked to him a couple times this year, but they are were really meager conversations. haha. but i got a glimpse of his personality. he seems like a cool guy,Hes the loud one in cl.(Im the opposite) even though he hangs with the 'preps' and i with the 'misfits' i have always been really quiet and reserved, its hard for me to be out there and let people know the real me? any suggestions on how i can build myself up im afraid to take the risk and be rejected. i feel like i dont want to disgrace him with my presence. i just wanna know more about him. any help would be GREATLY appreciated!