I may be needing a roomate in the near future, and the two likeliest candidates are both gay guys that I am friends with, but also have slept with, and to varying degrees, continue to sleep with (one currently has a boyfriend so we've stopped for the time being). If I was to move in with either of these guys, I would expect the sex would continue as long as we were both single. I believe in monogamy, and would set clear boundaries and rules with the roommate to ensure things stay chaste should either of us start dating someone. My question is if/when I got a boyfriend, he has a right to know that my roomate and I were likely fucking right up until he and I officially became boyfriends and came to an agreement that we would be monogamous. I feel like I should tell him only because he'd be likely to find out anyway. Thanks for the advice.