"There's nothing they can do to me." Factual. Partially. Marginally. Kind of.
"Why get by on your own when you don't have to? Why leave it all out to chance, eh? You have some very good friends here." She was interrogating him. She was challenging him and it was an odd sort of place for the Doctor to be in having not been on this side of Rose Tyler before.
Was he making her feel miserable? It hadn't been his intention. He'd meant to make sure she was safe and he'd meant to keep her entertained in the journals. He'd never intended to meet her, much less alone. Much less this close.
"Sorry," he said quietly, taking a step backward and turning to head off in the direction of the bumper car pavillion.