so this guy,

so here it goes, im kinda sorta, really into this guy..and at one point we both liked eachoter, but nothing really happened. we always flirt when we are together, and everybody thinks we are a couple; or they say we should date. the past two days, we really hit it off..we’re still flirting, nonstop and he even wants me to be with him like after school and stuff. but the thing is,, my friend was talking to him about me and he doesnt think I like him anymore, but I doo. and he is still hung up on this girl., honestly I dont know what he sees in her, she is a btch, even his bestfriend said it. she always uses him and flirts with him, AND she has a boyfriend, she is all over him, but then when her boyfriend comes around she drops him, and goes straight to her boyfriend,. so what do I do?

ps. my bad if this was long, :)