Notes: Spoilers for Journey's End.
Expanding Abyss
There's an abyss in his chest that he knows never will be filled again.
It was there before he met Donna and in the time that he has known her it had somehow begun to heal. No one has helped him heal like Donna had. She was brilliant and kind and beautiful. She saved him.
He hasn't been able to save her though and that is why the wound is expanding.
Donna is lost to him forevermore and nothing will ever hold the same excitement to him, or the same bounce.
That's what happens every time he leaves someone behind.
fin.