I like this one guy but i dont know what to do..?

i go to a private school and so we have mixers with other private guy schools. well theres this one really cute guy and i think hes pretty shy from one of the guy schools, and i am really interested in him. since i went to a all girl school im pretty bad at talking to guys and stuff. ive danced with this guy about 2 times but it was one of those, dance with the guy behind you, and then leave after the song. its usually really loud too. i dont know what i should do tho. should i ask his phone number or give him mine and if so how do i ask him out? one day? that night? how do i say it so i dont freak him out? or should i bring him with my friends and later ask him out? and where would we go!! pretty much i need help with EVERY part!!I like this one guy but i dont know what to do..?
if you're dancing with him again...wait until the song ALMOST ends

turn around and say...';hey i think you're really cool

would it be ok if i called you sometime?'; if he says yeah

get his number



then say '; oo and by the way, here's mine';. when you call/ or txt (whichever) try to get to know him a bit more...but try to make it more conversational// less question and answering. um....start by asking about the dance

did he like it?

comment on the food or punch...or something embarrassing that happened while you were getting ready

and go from there. after talking for maybe 2-3 days

ask if he'd like to hang out sometime

suggest a movie, skating, bowling....something engaging. NOT dinner lol