Final update: After several weeks of standing by my guns, he finally admitted that he was jealous, in a roundabout sort of way. He said there was nothing wrong with jealousy, that it's a normal human emotion.
I simply told him that when jealousy hurts other people, it's WRONG!
Ater that, he just got really quiet, almost as if he was in shock. Then after a couple of hours, he became super affectionate and wanted to help with whatever I needed. Before that I got lots of scowls and the cold shoulder treatment. It's as close to an apology as I'll ever get and I'm okay with that.
Thanks again everyone! I also have a better sense of how the 'vanilla' world views kink. Very interesting. I'm always amazed when people talk about 50 Shades of Grey that they think that's what it's really like. Nothing could be further than the truth.

WW