Consider: it is the healthiest and most normal thing in the world to go to your close friends and loved ones with problems in your friendships and relationships. Not to gossip, not to talk shit, but I go "Hey, me and (x, not related to my current partners) are on the rocks right now, can I talk it out with you?" and then you get input, advice, you get to process your feelings through conversation, then you're probably more equipped to go back to the person and go "hey I've been thinking and processing, I feel xyz."
Two major thoughts here:
Don't let anyone convince you that this type of conversation should only exist in therapy. Your friends and loved ones are there for you. Its called a support system for a reason. Getting advice and comfort is entirely different from talking shit.
If someone gets upset with you for talking about your interpersonal problems with your friends, its worth examining that dynamic. Why are they so worried other people will find out how they're treating you? This isn't like 100% always a bad thing, but like. Consider if there's other parts of the relationship that feel controlled. Consider how listened to and respected you feel, how safe you feel, how independent and free to act you feel.
