What do I introduce my "boyfriend" as to co-workers?

DivorcedGirl

Please help me out. I am divorced and live with a new BF, but he does not like to be called BF. We have a great, although somewhat unorthodox relationship; my role in the relationship is somewhat submissive. I work in a conservative field and I need to make it clear to co-workers that I am not single and not available for any dating. The problem with calling him a BF (besides him not liking that term) is that then my co-workers will start asking all the silly questions like "is the relationship serious?", "are you looking to get married soon?" and all that nonsense. I thought about calling him "partner", but then people will ask "what kind of partner?". I would really appreciate any suggestions on how to introduce him.