Work from the basis that unless you can clearly see for yourself that you very plainly did something wrong (in which case, I know you'd apologise straight away), you haven't done anything wrong.
For me, this was the basis to overcoming so much unhappiness with regard to friendships and relationships. We are just right, just as we are. If people don't like how we make them feel, they need to be responsible for that feeling, by talking to us respectfully about it and reaching a compromise, or by making distance. If we don't like how someone makes us feel, we need to take responsibility for that, in the same ways.
Nobody ever has to sit around wondering about their faults. If they find themselves doing that, that's an unhealthy relationship.
It's very liberating, and no behaviour has to be assigned to the 'wrong' bin. Incompatibility is a much calmer concept to accept. It's nobody's fault, nobody has to change, and everybody can get out of range of it.
No idea if I'm still on topic, here, but still relevant, I hope! It's what you said about our background that's sent me down this path. It's more general than just this friendship group issue you posted about.