how can i stop liking this guy who is such a playboy?

so there s this guy in my school.. we are in the same grade both senior in high school while he s the popular kid and he sleeps around like a lot... but he too damn cute ..i caught him staring at me few weeks ago and then we start to talk on facebook..and he flirts with me and everthing and i loe the attention .. but in school he doesn t seem to care./.. i m not the most popular kid.. so idk if he s just playing with me or not.. but i have a feeling i am gonna give in and have sex with him even though he will ditch me afterwards.. also that guy lives right next to my house ... what to do .. help me pls