Its called a triad btw. Yes its possible, but very scarce. I'd start with looking for some like minded friends and go from their approaching this in a dating manner doesnt seem to work. This kind of thing evolves with time, investment and a whole 180 degree switch on how most of us have been raised to look at relationships. Start by educating your self and finding friends.
Anyone want to be friends on Facebook?
Send me your name via PM