I need help with this fast please!?

OK, there is this guy (lol). He's my brothers friend and he's two years older than me. He's sooo cute. But, he's the type of guy everyone is in love with. I have tried so hard the past couple of months to not like him. Hes y cause he is good at sports and he knows every girl in the school is in love with him. Well we went to basketball camp with him, and he was "flirtin" with me supposedly my friends say. Anyways I just rolled my eyes, ignored him, and went on. He turned to my brother and said, "Who is that!?" He said, "My sister" and he said, "Shes really pretty!" My brother doesnt like it that he likes me now. I on't want to be just like every other girl in the school and like him, when the truth is I think Im startin to fall for him. Should I stop liking him, or what should I do? He spent the night a couple of nights ago and said, "Hey do you have my number?" to my friend she said no he said "But you want it!" He is so y!