<nods> Though you have mentioned the "distance" between yourself and Sir Ozme. So maybe it's not Really jealousy, but more Envy? Definitions that come to mind now are;
Jealousy= The belief or feeling that someone else has something that belongs to oneself.
Envy= The desire to have something someone else has.
So maybe even a bit of each?
It's quite natural for Friends to discuss things they are into. And since this other person is also your Friend, must be a little tough on her not to be able to share some things with you now, that were it not Sir Ozme she's interacting with, she would be able to? At the same time it's great that you've identified your own triggers to your discomfort, and have addressed themAnd set some Bounderies. Which are being Respected. And that's also great I think
You and Sir Ozme have been together a while now, and been through a lot. I have every confidence in the Both of You that Ya'll will Both Learn and Grow as You go. Anything worth having takes Time and Work. And Ya'll seem to be doing it
Huggs to You Both, and Brightest of Blessings.
Respectfully~SidheWolf