I am sure that you will find someone who is looking for just what you have to offer. Call me an optimist, but with billions of people in the world, I am convinced that everyone has to have a right "fit" out there somewhere if they are patient enough to find them.
With that said, it does seem that on Houseboy there is actually more competition for the the straight-acting types than for the more effeminate ones. Personally, that is my preference (if I am looking for a guy rather than a girl, it is specifically because I am turned off by effeminacy in either gender - that is not a criticism of you at all - we are all who we are, and that is beautiful) and the "supply" of more clearly gay guys (if not flamboyant as you) on the forum seems to be higher than the demand for them. Even if you just look at the top / bottom ratio, it seems pretty imbalanced - not that many available top houseboys, especially amongst the young, sweet, innocent boy-next-door types I find attractive.
So, anyway, the numbers may be against you a bit here, as they seem to be against me. Good luck in your search, anyway.