Autism / Autism Spectrum Support Group
Autism is classified as a neurodevelopmental disorder which manifests itself in markedly abnormal social interaction, communication ability, patterns of interests, and patterns of behavior. Although the specific etiology of autism is unknown, many researchers suspect that autism results from genetically mediated vulnerabilities to environmental triggers.
Quite honestly, the best thing you can do to help him is to help him see and understand the direct connection between his behavior and the results of that behavior and then help him think through what replacement behavior would get him the desired results. "Did hitting Bobby cause him to like you more or want to stay away?" "How would you feel towards someone who hit you when you didn't want them to?" "What are some other things you could try next time to show others you want to be their friend?"
Then ask him and encourage him to try these new behaviors and keep assessing if they are working better. Patience and practice. Good luck.