I don't agree with this "giving him power" nonsense. What power? The hot roommate ALREADY knows his roommate is into guys. He's ALREADY seen him checking him out.
The hot roommate ALSO is into guys or he'd never be doing what he's doing. There's no "power" over anyone here.
Take it from me. I let fear keep me from so many times over the years where really good looking studs made passes at me. And the result is me jacking off to what could have been, years and years after the fact.
The original poster has nothing to lose. The "secret" is not a secret at all. Hot roommate already knows. Original poster should take advantage of the situation and have a great time. Now that would be HIS power.
Original poster: Fear nothing, except years from now saying I was too afraid. I didn't do this because I was afraid. I didn't do that because I was afraid. Seize the day, my friend.
Also, i learned in life that when you're comfortable being you, really being you, then this irrational fear of others "finding out" goes away! It really does. Happiness is yours if you allow it.