Don't Stop (Unabridged) [Unabridged Fiction‪]‬

Crispin has been following Lisa around since she was a child, only no one can see him but her. She hopes she's isn't crazy but she can't be sure. And of course, the dead people who talk to her are no help at all.
Author James Patrick Kelly is a two-time winner of the Hugo Award and a 2007 Nebula Award winner. His stories appear frequently in Asimov's Science Fiction, and he writes the magazine's "On the Net" column. Publishers Weekly has called him "a meticulous craftsman in the demanding short-story form".