None of my breakups with Wendigo (boyfriend) were due to 3rd party jealousy. Each was due to specific circumstances requiring us to take a step back. The first was when we were a newly formed quad, as a couple he and his wife decided that before we could go any further, they wanted to ensure that Runic Wolf and I were getting quality time together. (Prior to Wendigo's wife joining in, he and I had some pretty out of control NRE that was settling down around the time his wife wanted to attempt poly with us and Runic Wolf (hubby). The second was when we attempted to open the quad to a specific friend. After a 3-some with said friend and Wendigo's wife, I learned that the friend had lied about his girlfriend knowing and being on-board. At the time she was still considering it. The friend also lied to Wendigo saying his girlfriend wanted a relationship with him and went so far as to arrange a date for them. The girlfriend thought Wendigo was going to be her cuddle buddy, while her boyfriend made it sound like she wanted sex. Luckily for them both, Wendigo actually listens to a woman when she gives him a boundary. When I discovered the lies and told Pretty Lady and Wendigo, things went down hill fast. We ended up taking a break for almost 5 months because Wendigo could not be in the same room with said friend w/o wanting to physically harm him. (He still can't, but time has taken the edge off.) Wendigo needed to focus on Pretty Lady (who had wanted the 3-some to take back some control over her sexuality), the whole situation set back all the work we'd been doing to help her move past her issues. I was okay with the break because I loved her too and we were still talking and Skyping, we just didn't see each other for months. The third break was actually no one's fault and was a true break up, even if it didn't last. Runic Wolf was seeing someone new and Wendigo and I were really taking advantage of it and enjoying the compersion. Then she suddenly broke up with him. At the same time, Wendigo had been feeling guilty for what he felt was putting our relationship above their friendship. After a date night with both of them, he told me that he thought we needed to break up. That it wasn't fair to Runic Wolf, especially after just being dumped. I took it really hard and Runic Wolf was pissed that Wendigo hurt me to make up for neglecting their friendship. It was a difficult month because we were all working together to get ready for a week long medieval fantasy camping event we were attending together. Every day, Wendigo and I would work in the work shop making garb and armor and I'd be quiet and try not to cry because I didn't know how being just friends was supposed to work. I'm affectionate with my friends (even make out with a few of them just for fun), so I was really confused on what my boundaries were supposed to be. In the evenings, we'd have dinner and they'd play video games until it was time to take Wendigo home. All the while, I was pouring my heart out to both of them over e-mail about how confused I was, about how I wasn't ready to give up on our relationship, about how I knew that someday our relationship would come to an end (I'm realistic), but that I wanted it to happen organically, not out of guilt or some misguided sense of nobility. A few days before the camping trip, Wendigo was spending the night. He and Runic Wolf played video games up until it was time for Runic Wolf to go to bed since he had work the next day. I leaned down to give Wendigo a quick hug good night and he pulled me into his lap, kissed me, and apologized for everything he'd put me through. That was almost 2 years ago and we're still together. Every once in a while, life throws a curve ball at us that makes it so we can't have the frequency we want in seeing each other, but we're committed to making it work.
We don't have veto power in our relationships, we try to discuss issues as they come up, not everyone is always happy with the compromises, but sometimes our kids or family have to come first and we've agreed that the kids don't need to know about the sexual nature of our relationship at their age (12 and 17) as they've got their own stuff to figure out. Wendigo got injured on the job in December. I was able to visit and cuddle him in his bed for about an hour, but his teenage son was home. Last month when I had surgery, Runic Wolf brought Wendigo to visit me in the hospital, but due to my incision and the IV, cuddles weren't really possible. Runic Wolf and his girlfriend have been struggling to find time with each other due to my surgery and her family stuff. It's harder for him to go with the flow than it is for me, but I've got a few more years of experience at it than him. (It's interesting watching him go though what I went through almost 5 years ago starting a new relationship.)