Here's some advice that may help:
You may want to tell everyone – or only the people who really need to know.
The Juvenile Diabetes Research Foundation (JDRF) offers this advice for figuring out who's who:
Do you wonder what to say about your diabetes? The American Diabetes Association (ADA) has some suggestions.
First, talk about people's fears, the ADA says. Tell them:
Here are some other things you can say (adapted from the ADA):
Friends who know about your diabetes can be an important support for you. Of course, a true friend will want you to be healthy and won't push you to do things you shouldn't do.