what to do with the unwanted monster?

A little bit of a bummer. I'd experimented with writing a horror story (not romance!!) and it got turned down, so I have a scary story with no home. Horror isn't really my forte, but I enjoyed the process of stretching my writing abilities into something I'm less adept at. I'll definitely try again within the horror genre, and in the meantime let the story sit for a bit. Aging a story means when I get back to it, I can always give it a stiff edit that'll knock it into better shape.