Not to do this to you again, but "you're" would be considered 2 not 1, "your" would be 1. To improve the haiku i would edit it like this:

You're gone. The void

you left is darker than black.

Wont you come back home?

Forget the and because you're takes two. Have that be a sentence. you that "the void you left" makes more sense

I like how it's almost like it's all one continual sentence, but still follows the form of a haiku. I also enjoyed the story that seemed so much more than there was. Nice job.