Hey Vanessa,
I think there's definitely something to what Mare said. It's not fair, but there are certain combinations of genre + Boy that are really popular and certain ones that aren't. If you write Nick romance or drama, for example, you are guaranteed an audience, as long as your writing is coherent (and sometimes even if it's not LOL). Romance and drama have always been popular genres, and Nick's the Chosen One, so it makes sense. Group suspense stories are another kind that usually do well. Slash, just like visuals, is one of those genres that people either love or hate, so that automatically probably cuts your readership by at least half... and then the fact that it's a Howie story and not, say, a Nick story is also going to keep some people from reading it. Like I said, it's not fair at all - a good story is a good story, no matter who the main character is or what kind of warnings it includes - but that's just the reality of it. You have to just write what you love and know that someone out there is going to love the same thing and enjoy your story.