He shrugged. "This room's as good as any." He couldn't face the thought of trying to stagger as far as his own room. "It's got a bed, it'll do."
He wanted to reach for the Doctor's hand, but even that effort seemed too monstrous, so he just tipped his head back so he could see the Doctor's face and said, almost desperately, a little boy clinging to his friend in the dark, "You'll be around though? Promise me you won't disappear on me again? Please?"