What should I do?boy problems!!?

There's this guy at my school who is kinda cute but idk him that well like we know who each other are but not like personally he has a gf I've been trying to impress him ever since my friend Jason introduced us and he notices me:) yesterday when I was walking with my friend Kim to her locker he yelled krista really loud like althe way across the hall then ran to catch up with us and said hey krista and did that cute half smile boys do then said oh hey Kim so I was wondering uhhh do you have a phone?( I do but I gave it to one of my friends bc he sold his to buy a minivan crazi rite lol) so I Sid ya but someone else is using it for a while until they get a new one so he said oh well my lockers this way so see ya tomorrow I guess I know he likes me but....what now