If the woman is attractive, it is different? My commercial is a very attractive female (and I mean, very), she flirted with me (my bad really, I sent weird signals, we didn't knew each other enough for the level of friendlyness I showed, it's an issue in my family, my father and my sister have the same), I put a "i'm moving in with my girlfriend" somewhere later in the discussion (it wasn't exactly true), bam, clarified, but I felt really awkward doing it and finding a way to close that door. I think that if you don't see the other as a potential mate, it's always awkward.