I had a school friend who over time showed she didn't like many people. It was super easy to say the wrong thing, and I noticed over time she got rid of many friends in our 20s who she deemed unhelpful, but I could see they wanted to help and be there for her, they just couldn't read her mind. If you tried to do what you thought she might need and it was wrong, she would jettison you. I suspect she was super avoidant due to childhood abuse. No one was good enough if she got close to them. I got left in the cold too.