Just Another Night Out

So I've been with this guy for about six months now and everything's cool. Nothing too special or crazy, just solid. But last week we went to this party, and there was this other girl there who looked like she had that 'I'm here to be seen' vibe going on. Anyway, the drinks started flowing and so did I, maybe a bit more than usual. And somehow my boyfriend ends up dancing with her for what felt like hours. I didn't mind at first; it's just dance after all. But then they start talking, and before long, he invites her to another room. It turns out, he was just being friendly, but I caught myself feeling... not jealous exactly, but definitely intrigued by the idea of him with someone else. We ended up going home anyway, and that night I didn't feel like having sex, which is rare for us. But then this morning, I woke up wanting to try something different. I wanted him to pretend he was with that girl from the party, but not in a real way, just as if we were playing out our own little fantasy. It's probably silly and immature, but it felt like what I needed at that moment. So here I am, confessing this to myself first before sharing it somewhere else maybe. I don't know if he'd ever want to do something like that, or even if I should ask him. But for now, it's just a weird little thought in the back of my head.