John Green said this quote

The end occurred mostly in her whispers and his silence - because he couldn't whisper and they didn't want to wake Colin's parents. They succeeded in staying quiet, in part because it felt like the air had been shocked out of him. Paradoxically, he felt as if his getting dumped was the only thing happening on the entire dark and silent planet, and also as if it weren't happening at all. He felt himself drifting away from the one-sided whispered conversation, wondering if maybe everything big and heartbreaking and incomprehensible is a paradox.