It's even more confusing today with cuddly werewolves and helpful ghost. Where do you put a vampire love story?
I'd call that Supernatural Romance. I think that is the bookstore term these days. Frankly, I love this new genre.
Although, is it new? King Kong was kind of like this - he was cuddly with Fay Wray. Tis beauty that killed the beast.
Oh and that brings to mind Beauty and the Beast!