I don’t think I even breathe when we’re not together,” she whispered. “Which means, when I see you on Monday morning, it’s been like sixty hours since I’ve taken a breath. That’s probably why I’m so crabby, and why I snap at you. All I do when we’re apart is think about you, and all I do when we’re together is panic. Because every second feels so important. And because I’m so out of control, I can’t help myself. I’m not even mine anymore, I’m yours, and what if you decide that you don’t want me? How could you want me like I want you?

He was quiet. He wanted everything she’d just said to be the last thing he heard. He wanted to fall asleep with ‘I want you’ in his ears.

Her heart sank into her shoes as she realized at last how much she wanted him. No matter what his past was, no matter what he had done. Which was not to say that she would ever let him know, but only that he moved her chemically more than anyone she had ever met, that all other men seemed pale beside him.
—  F. Scott Fitzgerald, A New Leaf