Please help me flirt!?

There's a guy who sits next to me in a few of my cles, i'm 15 and i don't know how to flirt. How can I subtly flirt with him in cl and in the morning when i see him in the auditorium? We are good friends but I want to be a little flirty because I really like him. Also, i'm kind of shy and i don't want it to be awkward, i'm not one of those girls who can just run up and hug guys, I don't even know how to do THAT. How can I flirt with him and hug him and stuff, please give me some tips.