How to pretend to be straight? ?

I'm in the military right now and I'm gay. I've never been with a girl ually and I'm not interested in trying. Lately my friends who are also in the military have been inquiring quite regularly on my life both past and present, they've even taken me to strip clubs and tried to set me up. How can I make them lay off me without them suspecting the truth? The DADT repeal is in the works, but it's not done yet.