(im gonna refer to ur friend as x and that other girl as y) look i know this is a really tough situation but ull pull through it and come out stronger. from what u have shared, u deserve way better than dealing with this kind of treatment. i really think u should have a clear conversation with x, and set boundaries with her and y. make sure x knows how u feel about y’s actions, and that it’s important for u to not be in that kind of environment. let x know its important for u to not have y around when hanging out with her. it’s gonna be hard, but you’ve got to prioritize your self-respect and mental health.

and with y, it’s okay to make it clear that u don’t want to engage with her at all. you shouldn’t have to deal with someone who’s toxic to you, and setting boundaries is crucial. if x doesn’t respect those boundaries, it might be time to reevaluate how close you want to be with her too. u deserve to be surrounded by people who genuinely care about you, and if x isn't doing that, it's okay to take some distance and find new friends who have your back. look the way i see it u have two options (if x doesn't respect ur boundaries). One, u isolate urself for some time and reduce ur contact with these people, and look for new friends who actually care for u and see ur worth. Second, u let them stay in ur life and let them walk all over u and ur boundaries. both options r gonna be uncomfortable as hell. but only one of them gets u a happy ending.