This is a tough question because every family situation and dynamic is different but here is what I have found works best in most situations.
First off this is your issue. You have celiac disease and I’m guessing that the rest of your family does not. Having celiac disease and understanding all of the intricacies that go along with this disease is confusing, is hard to fully grasp and you live with it every day, they do not.
The question is do they really understand and know how serious this is? My guess is no, they have most likely read some article that the whole gluten thing is a joke and or have a friend who tried it to loose a few pounds but they have no clue about the seriousness of your own health and what it means long term. And if you have a good and close relationship with your family once they understand this they will come around.
In the meantime, what do you do about family dinners and get-togethers where they have no food for you? My response is always bring your own. You cant expect someone who is not educated and doesn't know how quickly something can be cross-contaminated to be responsible for your health. I’m sorry but that is the way, it is always going to have to be this way moving forward if you are a celiac. You need to be prepared.
I also suggesting if you spend quite a bit of time at this house, go food shopping and bring your own snacks and goodies and leave them there. Ask to clear out the top shelf in a cabinet to store your own food. Chances are your family has no idea what to buy you, but if you bring in your own food they might write down the brands and restock your shelf for you.
And this is a biggie, the next time you are tempted to eat just one bite of something, there is no falling off the gluten wagon, everyone is watching you, even when you think they aren’t. Your family needs to understand that you are taking your health seriously and then they will take your health seriously.
Hope this helps answer your question, dear reader. Feel free to share your thought and feeling on this below. And if you have a question of your own, click the ask a question button and I’ll do my best to answer soon.