Goodbye Girl

It's a straightforward story as NAwlinsC says. Just wanted to point out that "Goodbye Girl" is intended three ways:

• "Goodbye, girl", won't be seeing you again (with regret), and
• Goodbye Girl, the lady's profession -- she takes men for what they have and bids them goodbye.
• "Goodbye, girl" again, this time for his wife who has now moved away.