Rick had to admit, it was hard to ever really relax, wondering what might come at them next. Sometimes he felt like he was sleeping with one eye open, or at least sleeping only very lightly, ready to jump up and fight or flee at a moment's notice. Maybe he'd get used to it, but until then? He just tried to eat hearty and stay fit to make up for the constant state of hyper-vigilance.
"Glad you're here, too," he said, "You keep me sane."