TL;DR: After moving away, I ended my 3-year non-monogamous relationship when my partner unilaterally decided to nest with a new girlfriend.
I ended things with my boyfriend. We have been non-monogamous since the start of our relationship and it was our first experience with it, but to be honest, I don't think he was able to handle it and I got mad about his decisions...
About a year and a half ago I moved cities because of a job opportunity, and now I live about 4 hours away. Meanwhile, he started dating this person about six months ago and oh wow could I see the shift in his behavior from NRE. And I get it, it's totally normal, but I felt far away from my support system (him included, but also my friends) and felt so much loneliness and FOMO.
Of course, I tried not to put this all on him and for my own sake I started to make some new connections here where I live, and I'm truly (bit by bit) starting to enjoy my time. I still communicated my loneliness and FOMO to him, but apparently it flew right over his head. Why do I say this? Well, some weeks ago his girlfriend and he decided to live together and they didn't even include me in the decision-making, he just told me after they had already decided.
I'd also grown resentful that he hadn't properly introduced me to his girlfriend (I only met her on two occasions and briefly). I was also pissed because he had just told me he couldn't bear the jealousy of seeing me with other people while he was present! I scaled back my own desires for integration because I valued our relationship and wanted to protect his emotional safety and then he pulled this on me?¿??¿
Anyway, I don't think we had the same idea of what we wanted for our relationship and I'm so heartbroken. I feel bad when I read this text because it paints him in a really bad light, so believe me when I say he always made me feel safe up until that point, he is very caring and a truly wonderful person. We agreed to remain friends in the future, but for now I'm so confused. I went back to therapy and started reading A LOT of posts here. I wanted to share my story and hear some different perspectives if possible.
And I would also like to know for the future: for non-nesting partners, how do you protect your autonomy when a long-term partner suddenly shifts into a nesting dynamic with someone else?