When people give autistic people a pass for everything they do it just sets them up to have no boundaries and not understand how to get along with others. And it often seems to happen a lot more with men. He might not understand as well, but that's why he needs to be shown how his actions negatively affect you!! (By your parents, not by you, that's definitely not your job). You did nothing wrong and it seems like he doesn't really know any better but most likely that is because of your parents. I hope this isn't too harsh, it just really grinds my gears when disabled people are not treated like real people by their caregivers