Aspergus for my now teenager

My son turned 13 last month and it has been a difficult transition for him. He is growing up physically but mentally that is taking its time. Don't get me wrong there are times when he does really act his age and is sensible but most of the time he is happy clowning about and making his little noises which help keep him calm. I allow him to be himself at home as society requires that he conforms to an ordinary person which he finds difficult to sustain for long periods of time. So home is his haven, he act and does as he pleases but this has a knock on effect for his younger brother who hates the noises and flapping that he does. They get on some times but his younger brother is very bossy and demanding which takes its toll on my eldest. It is hard especially in the holidays when they are with each other 24 hours a day 7 days a week but we manage as a family and I keep things moving around the house so no one gets bored. It means I sacrifice my own time and things I do during the week but if it makes the household happy it's not really a sacrifice.