"No, I can sleep," Dean said. "Just can't stay asleep. So probably the correct answer would be no, I can't sleep," he said, scrubbing at his fuzz of hair with a hand itching to do something.
Well, it wasn't like Neville had probably had a sea of roses considering he ended up in the Room of Requirement so Dean decided to elaborate. "I get nightmares, not every night. But enough. Or maybe they're not nightmares, just memories blown out of proportion. In some cases I'm not sure." He looked at Neville, not sure if he should stop or carry on. How much of what he'd experienced was explainable, understandable to anyone else he wasn't sure.