Yep totally agree with you. If she has something, like depression, which is possible on top of her ADHD then she needs to get help. I hear that people with ADHD usually suffer from depressiom and anxiety too so if that is the case then she needs to accept her illness and get help. If it is not another mental illness then she just may not really care about maintaining friendships or at least keeps them at arms length. In a way, I am the same way, I don’t allow people to get too close quickly. But I would never go back and forth between wanting to be with them multiple times a week to practically ghosting them and then back again. That is just rude in my opinion.