Wren is perfect but she doesn't know it. She doesn't like grapefruit juice but her mother says "of course you do, it's your favorite." And Wren goes in her mind "really? oh! okay."
Come on! You DON'T know if you like something or not?
At school, Wren is some girl's role model because, as the girl tells her, "you know yourself." Thus the purpose of the story is to show that people are mistaken because Wren has never been herself but what her parents want her to be.
Charlie, in love with perfect Wren since the moment he first saw her but, you know?, he will never have a chance because Wren is everything he is not.
Yet, destiny will make Wren to notice Charlie NOW - when she decides to find herself (talk about perfect timing), and as usual, they fall in love and blah blah blah.
If you want to read a romantic cliche you'd be better off with Pushing The Limits; not great but less cheesy.
Oh! and if you want to read the first time Wren has sex, just skip to page 239. Can the girl produce one full sentence?