What is the Name of this movie? - its killing me?

it starts off with 3 girls who get played, anyway they're sittin in a resturant and decide there going to play the next guy who walks in the door... unknown to them a guy sittin in the resturant overhears and runs out the back door into the front ... making him the guy to get played...... one of the 3 girls falls in love with him.... he falls in love with her..... she tells him that she was playing him and he tells her that he knew.. then she gets pissed ... and they live happily ever after!!! (FYI: Its not John Tucker Must Die)