It probably helps that in letting Ted 'protect' her, she's protecting and reassuring him in return. It's for his own sake as well that he wants to be with her, and make sure she's alright.

"Alright then," he says, getting to his feet. "Well, after all that french toast, want to get the chair?" he asks. It's not that far to walk, but he knows she errs on the side of the ambitious, so he wants to balance it out a little and make sure she doesn't overextend herself.