Cautiously, he reaches out for her again, this time to take her hand. He can't deny his attraction to Morgana, he simply can't, but even with it, his feelings for Rose haven't diminished. Arbitrary romantic obligations don't make a whole lot of sense to the Doctor, but relationships in general don't make a lot of sense to him, either.

He just doesn't want to hurt her. To hurt anyone, really.

"I don't want you to be anyone but Rose Tyler," he says.