I’ve been with my partner for 6 months, we’re queer and have a very established relationship for that relatively short amount of time. We have been open our entire relationship and we’re both confident with it. We are each other’s only romantic partners at this time and as a result our relationship looks a lot like a monogamous one. I have been putting all my energy into our relationship and not pursuing other connections, fully of my own volition. She has slept with one other person, who I’ve met and spent time with, and I was mostly secure in that. However she recently met another person who she immediately slept with, and for some reason I am struggling with hearing about it. It doesn’t help that I was put in a position of meeting this person the first time they met, without much room for me to avoid it. Aside from that I had been feeling some distance, so I think I’m taking it particularly hard. Long story short, I could use some advice on protecting my feelings when it comes to her sex life. We’re truly best friends in addition to partners, so in a way I really appreciate how much she wants me involved. But this time I’ve been feeling sick just thinking about it, and it makes me feel completely pathetic to have and express these feelings. I’m being graceful with myself as much as I can, but it ruins my mood when she even mentions this person and I know she can feel it. I’ve never posted here before because we’re so good at working through things, and this is no different. But I could use some support and guidance.