I have this friend who has ADHD. We're not mega-friends, we just seem to know each other, as he hangs around my friendship group. The problem is, he's got ADHD, which I don't have a problem with, only that he seems to have a crave for attention. He'll start dabbing near us to get attention, yelling out random things like "I like men!" "I have cancer!" or "Oh, I farted!" every 30 seconds with his annoying squeaky voice, even going as far as to bring up porn during school just to try to get a laugh out of us. It finally got too far as he decided to sneak up behind me and strangle me in front of tons of other students. I have nothing against ADHD, but how do I get him to just calm down and see that he's annoying not only me but others in my friendship group too? If it's relevant, both him and me are 14.