Instead of introducing my boyfriend as "my boyfriend," I wish there was another word that I could use in situations where it was appropriate.

I really wish there was a word that meant, "this person is my partner and I am emotionally committed to them, but it's totally fine to flirt or be sexual with either of us if you are so inclined."

Introducing or mentioning your partner usually stops any flirtation right in it's tracks - which is not surprising as most people assume you are both off-bounds because monogamy is their only frame of reference. It would be really nice if there was a widely known term that could easily convey that we love each other, but we are free to play around with others. I suppose that term probably won't evolve until non-monogamy is more widely socially acceptable.