Glad You Came
The Doctor gently opened the door to Rose's room. He had just finished stabilizing the TARDIS after saying his final goodbye to Rose. He knew Mickey would protect her, even though he is still an idiot. The Doctor slightly laughed at that thought. It was so ironic that she had chosen him over Mickey, and now Mickey would get to grow old with her.
He slowly walked over to her bed with a sad reverence. She hadn't made her bed, like usual. He looked closer at the mess and saw that her Ipod was tucked between her blankets. He gently plucked it from the bed and turned it on. The Doctor put the headphones in his ears. "Glad You Came" by The Wanted filled his ears.
As the song's lyrics sunk in the Doctor realized why she had it. It was the story of them. She came with him, to explore the stars and in every moment they had together they made sure that all that had counted between them was the then and now. But now their time had ended, and they could never be with each other again.
As the song came to the end The Doctor shut off the Ipod and sank gently to the floor. And the Lonely Wanderer sobbed. But, no matter what happened, he would always be glad that she came.