If it occurs to him that he shouldn't get too far ahead of her in the event it makes them easier to separate, he doesn't act on that knowledge. The more pressing matter seems to be not standing still, even if he has no particular direction in mind. She should know more than most people how stubborn he can be if he puts his mind to it, and it's a quality of his that only gets worse when he's agitated.

Besides, if he keeps moving, he can distract himself from the fact that despite his assertions otherwise, something is very wrong.

He makes it a few more steps before he's suddenly overwhelmed, something twisting in his chest that sends him bracing himself against the nearest wall.