I'm sorry you're feeling this way.
I wonder if letting him/them read this post would help. It seems pretty well thought out, emotional but not in any way making accusations. This way all your thoughts and feelings are heard before they get a chance to begin responding. You can't purse your feelings, even if they are upsetting to someone in the triad. Breakdown in communication in any relationship often leads to breakdown of the relationship.
I hope you get better advice.
I'd rather be hated for who I am than loved for who I am not.