Am I really going to kiss my boyfriend's best friend? Yes. Yes, I am. - I just found out my boyfriend cheated on me with his best friend's girl. - Now his best friend and I have a plan to play them like they played us. There's only one problem. Everyone knows Zack and I can't stand each other. - The uptight perfectionist and the slacker bad boy? - And that, it turns out... - So I tell him I'm in. I'm down to make my ex pay. - His smile turns wicked. "That's my girl."" I'm not your girl," I say. - His eyes darken as he wraps an arm around my waist and tugs me close. "You're not his either."