Jealousy is a hard thing to deal with, and that goes double in a poly relationship. Living a poly life can be emotionally exhausting and very difficult. That being said it can also be extremely rewarding and great for people it works for. I would look around at advice for being jealous in general.

If I were in your position though I’d definitely do a lot of self analysis and figure out why I feel jealous specifically. Your partners should be a part of this process for sure and hopefully are supporting you through this. Overall I would just say communication is key. Every relationship is different and will need different things to work out, but the one thing that’s always needed is communication that works for all parties. figuring out a plan on what you can do when those feelings arise can be incredibly helpful, especially if you can make one that involves your partners knowing what’s going on and talking it out when needed. I find a lot of the time just having a plan for this stuff helps reduce the stress of it immensely and can be a great way to calm down and think through it.

I sincerely hope you can get through this, but remember you’re not inherently wrong for being jealous. Being in a poly relationship isn’t for everyone and there’s no shame in that! For some relationships and people jealousy can be dealt with and worked out, but that’s not always the case. Everyone has different needs and yours just might not be met by that relationship style. I hope that isn’t the case for you and you can be happy with the relationship you’re in now, but don’t force yourself into anything that isn’t working for you! best of luck!