It's a bummer, innit. My son got diagnosed during half term. He's 16 too. He keeps a close eye on the BG readings and makes sure he eats at regular intervals. His dad's also T1, and the GMNT has seen a fair bit over his lifetime, so has a reasonable idea of what to expect. From that point, I suppose he's lucky...
Read all the bumph they give you, take the diet advice to heart, and keep plugging away.
And come and rant, cry, bellow, or scream with laughter here any time it takes you that way.