Teen Angel — James Hartley

Angie, a teen aged girl, was killed in a tragic accident. As a ghost she became convinced her boyfriend Dickie still loved her, so she decided to return to Earth and win him back. But her timing was a little off -- thirty years off! -- and she found him grown, married, and with teen aged daughters of his own. When she discovered she was stuck there and couldn't return, she figured there was no choice but to break up Dickie's marriage ...

Plus bonus short story: Ghostly Dreams