Oh, the ending!
So sad!

My favourite part was in the middle:

The door creaked as it opened and her steps echoed back into the empty house as the heels of her boots struck the porch; They felt like hammer-blows to my heart, destroying it...But no, that couldn't be; It had broken last night when she said she was leaving.

If you some day decide to leave your work you can always become a writer. Such a good story. And I love short stories.