There's this girl I've known for a while and we hang out at school(only me and her) But she just wants me to do what she wants to, but i never agree, 'cause i take the lead always of course

But she gets mad always and after a while she calls me.
I've got a rep in my school for 'The Player'. She's playing a lot of hot and cold games. I plan on saying "Quit playing those hot and cold games, the more you do them the more unattractive i find you, those games worked on some under-average intelligent people but not on me." But i don't want to fuck things up, anyone has an idea?