Honestly I don't see anything particularly wrong with it as long as nothing happens. In college I've had female roommates where there was a mutual attraction between us and nothing happened. It's all about how much self-control you have, could I have had sex with my female roommate; probably yes, but did I no. If you can practice self-control then really you have nothing to fear from living with a boyfriend/girlfriend or people of the opposite sex.

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Unabashedly Unreformed.