Polyamory Community Group
A place to discuss living a polyamorous lifestyle - the joys, the challenges and everything in between. Polyamory (a hybrid word -poly is Greek for many and amor is Latin for love - coined by among others Neopagan poet, author, lecturer, and priestess Morning Glory Zell-Ravenheart) means "The practice, state or ability of having more than one sexual loving relationship at...
My suggestion is to call a meeting between you all so that you can communicate your feelings in a healthy way. It's okay to communicate that you feel angry, without acting out angily.
This will be a challenge, but know that you're not the only one who is supposed to be supportive. Also have some suggestions on what they can do to be more supportive for you.
If they aren't receptive, then you may have to accept that the relationship isn't one that works for you. If that turns out to be the case, what you would do next would depend on knowing what you want and what your options are.