The Question and Answer section for Looking for Alaska is a great resource to ask questions, find answers, and discuss the novel.
What page number was the quote "People were created to be loved. Things were created to be used. The reason why the world is in chaos, is because things are being loved and people are being used," on?
I have looked through every searchable text I can find, and this quote does not show up. Like you, I find multiple sources that say the quote is from Greene's novel, Looking for Alaska. I'll keep looking and see if I have any luck.
Check out Expectations vs. Reality at the GradeSaver link below:
Miles says he is going to boarding school (his father's former school) as “I go to seek a Great Perhaps.” His parents believe he wants to leave their home and go away to school because he has no friends.