Pretending that you're "the girlfriend" of the most attractive guy you have ever seen in your life, who for sure doesn't even know you, is not a big deal,
Not.
Not until "the boyfriend" knows that he has a girlfriend.
Pretending that you're "the girlfriend" of the most attractive guy you have ever seen in your life, who for sure doesn't even know you, is not a big deal,
Not.
Not until "the boyfriend" knows that he has a girlfriend.
Add in a normal, sarcastic apparently "different" high school girl and "the" hot, popular douchebag of a high school player, and voila : there you go!
A cliched high school story.