HI AnnaBelle,
Yes it totally sucks that you have a disease that sets you apart! The good news - it will get better and easier esp when you feel better over time. I have two kids - they both have celiac, one also has diabetes.
For them, the first year was hard, esp when they were subjected to my baking failures - first pizza crust I made from scratch tasted like cardboard. Then I found good recipe but didn't bake the crust first - just put toppings on ....sigh...best to read the directions
My kids love the kinnickinnick pizza mix as well as their frozen ones. They also carry donuts and muffins - carrot muffins and choc chip are very good.
http://www.kinnikinnick.com/Its been way easier now that we know which restaurants to go into, what to order etc.
Brown rice noodles are great - we made lasgana yesterday with the brown rice noodles, served it to guests and they never knew.
Maybe when you get together with friends - scope out restaurants in your area and talk to the staff ahead of time - so that you dont have to be "center of attention" when making an order. Talk to your friends about it and educate them - basically you have decided to eat healthy and focus on the foods you can have.
It helps ...... but allow yourself time - you are restricted with your eating and at an age where being cool doesnt include knowing all the forms of hidden gluten
Have food in your house that can make fun snacks when you get together - my kids love corn chips and cheese, one likes salsa with that, fresh fruit and veges, varieties of cheese, sliced meat, gluten-free cupcakes for comfort food moments

, Bette Hagman has great recipe books - veryone (non celiac too) loves the gingersnaps I make using her recipe. Glutino makes gluten-free pretzels.
Hang in there, lean on mom and you will surprise yourself how smart you are at eating healthy after time has passed. You sound mature for 16 - because you already have enough introspection to recognize your feelings of loss (of "normal" eating freedom), you reached out for support and it sounds like your family is supportive, your 16 and now you have something that sets you apart
In spite of all that - you are following the diet and wanting to stick with it - you go girl!!!!!!! Your body will love you for it .
Dont know if this helps - just wanted to say "hang in there"