((OOC: He, from my point of view, knows all of his companions dont want to leave, so he leaves them. Because he doesn't want to watch them grow old and die because it breaks his heart. That, or he has to leave them so they won't die. Like Sarah Jane. He left her because he didn't want to keep ruining her life, and watch her grow old. At least, that's how I understood it. And also, the fact that he was put on trial for interferring with fixed points in time and she was brought up would make him more likely to avoid her.))
[He doesn't wait, he just keeps walking, and turning corners to lose her. He's not going to stop either. He's always running, and always will be. And he'll keep running from his past, from his life, from everything. He continues to run until he routes back to the TARDIS. Slipping inside and locking the door behind himself.] I'm sorry. [And he remains inside, not wanting to face his past.]