How To Make The Opposite Sex Attract To You?

Dress up, make up, be fun, funny, cute, pleasant, etc...(have done it all) any other ideas?
I am into someone who is a smart, atheltic, sweet, and shy. How do I get him to approach me? (he introduces himself to me before but now he seems at though he is ignoring me)...Is there any suggestion for attracting him in a decent/non-slut. I get really nervous when I am around him. What is the point where a guy would approach a girl without resisting her?