Hi Sam!
My son Tyler was diagnosed last Sunday, he's 15, and sadly me and his Dad had left it undiagnosed to the point he was quite desperately ill.... Anyway.... That's the past and just CANNOT be dwelt upon except on quiet moments when you need to (or that's working for me!)......
Tyler is coping, we are all slowly adjusting, but....he was kinda moody before hand to be fair and I think we're over thinking it ....i have a suggestion.... And that's all it is as I think it will work a bit for our teen.... Basically Tyler NEVER swears, has never been allowed to and is by no means perfect and slipped up, as have we... So during a tearful chat I told him to YELL "F YOU DIABETES, YOU WON'T OWN ME..... YELL, SWEAR, RANT!!!".....this may seem horrible but seems to just shake him out of it to be able to talk..... Obviously tone it down for your 10 year old but you never know.... I think anything that can help may make a difference.... It's only been a week for us, knowing his mood swings he might reject that idea if it happens again .... So tough on them.... I hope he settles