I'm in a 4 person family, and my sister is the oldest. She's 20, has Aspbergers, and acts like a child sometimes. She always finds a way to argue with my family, or interrupt someone when speaking. She makes random loud noises, like if we go over a speedbump, or if she gets bumped by a person. She always chews with her mouth open, and tries to push people into doing something she wants. She recently started loving homestuck, and goes on and on about it, and my parents fake interest in it. Within the past 6 months, everything she does makes me irritated. Every time she mentions homestuck, every time she makes a loud noise, every time she chews with her mouth open. I know she can't help it, and I used to always tolerate everything she does, but whenever my family and I go out, I'm always trying to ignore her. Everything she does makes me angry. I hate it, I feel like I hate her, and I just can't stand seeing what stupid shit she does next. I feel terrible ranting about her, but I needed to talk about it. Should I get a therapist to talk to about this? Is there something I can do to make her behaviors more bearable? Thanks. tldr: Older sister has autistic behaviors that drive me insane. I think I need a therapist to talk to about this. EDIT: thanks for the advice. I spent tonight trying to realize I was overreacting, and that she isn't trying to annoy me. It was a lot nicer, and we had fun talking about super smash bros. Planning on playing together soon!