I was reading a story on this website around a year ago. It was a Harry Potter parody. The story hadn't been centered around hogwarts or anything, but instead, there was a whole bunch of new stuff. Harry made himself an imaginary friend/sister that only he could see and he develops feelings for her and I 'think' they eventually have sex. I would really appreciate it of someone could tell me the name of the story because I am having no luck whatsoever finding it now.
P.S.: the story's description also said something about Harry either becoming the greatest wizard or dark lord. Hope that helps in the search.