What to do about this?

im a freshman girl and hes a junior....our lockers are next to eachother and i really like him. he talks to me sometimes and gave me a nickname. i really don't have the guts to talk to this guy though. so schools over monday. i could add him as a friend on facebook but i don't wanna seem stalkerish. idk. what can i do next year? i mean i looked at his facebook (yeah i know....stalker :p) but we have a bunch in common so how could i bring that up. thanks for any advice nd tips :)