The Doctor goes through his life thinking that he can do nothing but help people. I believe he does this to make him feel worth something. If he is not out saving people, then his life is meaningless. He needs to be constantly reminded that he means so much to so many people, and that they don't just love him for saving them time and time again, but rather for caring enough to at least try and save them. The Doctor claims that he has his companions for company, and to see the universe through their eyes, but he also wants to show off to them, and make them see him when he's not just saving people, but when he's just sacrificing himself for the benefit of millions upon millions of people. All because he cares so much. And occasionally, people try to save him, to let him know that he has been noticed, and that he is loved, even if he often feels alone, he never is.
The Doctor in the blue box
Darting through time and space
Just trying to fit in
Trying to mean something
He thinks he's alone
But really he's not
He's got the biggest family in the world
Though that's sometimes forgotten
The Doctor in the blue box
Alone, but not
Filled with emptiness and joy
Passion and love
Bravery and forgiveness
He will never be forgotten
Not by anyone
In all of time and space
The Doctor in that little blue box
Big on the inside
Small on the out
The Doctor in the blue box
Don't let the light of his hearts go out