If they bully you with assault then you should definetly ask for help, if they don't still ask for help but try to care less, think of it this way.
"Damn these bullies suck, I hate them and their opinions don't matter"
Also judging by most autistic people they're mostly bullied because they're autistic so if they bully you because you're autistic I can confirm they're stupid and you shouldn't care about their opinions