Ah, John Green. The leading author of Young Adult books, it seems. Nothing short of a genius, to be honest. His books always give out a particular message. Paper Towns was written by Green to show that we, as people, romanticise others. We either treat them as Gods or dismiss them as animals (As he says). And it is crazy how true this is. Paper Towns is the story of a boy named Quentin who romanticises a girl, she is a Goddess in his eyes, and he's obsessed with her. And it isn't healthy, it isn't healthy to love someone so much.
Many people see Paper Towns as a love story, many people only care about what happens of Margo and Quentin. I have a friend who I gave my copy of PT to and after reading a couple of pages, she came to me and said 'just tell me, do Margo and Quentin get together in the end'. I told her she was missing the point of the story, I told her to carry on reading. Paper Towns is about Q finding himself, it's about him realising that some things matter more than the girl next door and that some relationships like his friendships matter more than his unhealthy love for Margo. Of course, Q will never not have feelings for Margo, but he has learnt his lesson by the end of the book. I do agree with you, John Green, it is a treacherous thing to treat a person as more than a person.