How do i get his Attention(and keep it)?

ok if you have hs number then you must be some kind of friends. so just figure out his favorite basketball team or something he likes and approach him and talk to him about it. if he talks back then you in a convo! just keep talking about it if he wants to continue talking to you he will keep talking about different things, try to add questions in and stuff like so,and,how.....etc. you wil be dating in no time!!!!!!! good luck!!! dont be nervous!!!!!! just stay calm and keep talking,dont babble!!!!!