Poor lil fella. Those are big issues for an 11 year old to be contemplating... It sounds like he just can't stop his little brain from working overtime. It also sounds like he is rigid in his behaviour, which is commonly associated with anxiety (I mean in that he's got a fixed idea that he wants to live in a court, at all costs, and it is everything else has to fit into his idea, rather than adapting his idea to reality). Has he always been like this? Has anything difficult or traumatic happened of late? How does he handle stress?

I think he'd benefit from seeing a professional who can help him work through his anxieties and give him the tools & techniques to train himself to recognise 'worry thoughts' and stop himself in the process. Probably before high school where a whole new world of anxiety and insecurity can be opened up.

Best of luck with it & good on you for picking up on it. Together you can address it so that it doesn't become a problem that dominates his adolescence & adulthood.