Not Caring What People Think

I am currently going through a family matter where my brother and I have disconnected. He has also disconnected from my parents. I respect the concept that he is responsible for making his own decision and that it is not a reflection of me however, when I think of him telling other family members about our situation, I am afraid of their judgement of me. I am afraid they will believe all of the negative things he says about me and think poorly of me.