"Didn't let her. Couldn't get close enough to take the Time Vortex out of her." The Doctor took a step away from his other self, leaning against the wall. "'Can't keep protecting me, Doctor.' Last thing she said to me, kept pushing me away. Couldn't watch her burn, kept trying to stop her, get to her, try to help her. Couldn't, not until it was too late."
His current companion had told him that he needed to get over it. ...you can't keep moping about after a lost love. Life and death happen... Her words ran though his mind, stinging like a slap in the face, even now.