I had to change my way of thinking about it. I started a blog shortly after dx and one of my posts was about feeling like celiac was all I talked about. It's typical that newly diagnosed celiacs seem to be talking about it and the people around us talking about it. You have to change your thinking on it. I talked about it because it was new and scary and very relevant in my life at the time. Others talked about it because they didn't know about it and they're curious. It obviously still comes up but here's a way to look at it...at least they're asking. It shows that they're concerned and they're trying to make the right choices for your benefit. Last week my friends and I got together for Christmas and I spent a lot of time on the phone with the hostess because she was asking questions and making sure that she was getting things that were safe for me.
Just take the attitude that people do care and they're trying to figure things out, just like we did after diagnosis.