I have never been one to really talk about my diabetes much to anyone but my mom.
All my friends, well a high majority of them..mostly the ones I grew up with or have seen me do needles and all that, know I have diabetes..and sometimes they will ask me a question here or there about it. Just general questions, and I'm more than happy to answer them. Otherwise, I usually keep to myself unless it's something like, one of my friends offers me a drink of rum and coke, and I have to decline cuz my "blood levels are too high right now, have to wait for my correction dose to bring it down a bit then I'll take you up on the offer". But it's not really awkward anymore. My friends are used to it, and most people don't question it.
Otherwise, my mom is the only person who knows what goes on a regular basis with my blood sugar because she was the one who had to take care of it so she still has the motherly instinct to check on me and such. Plus, she answers(or calls my endo to get the answer) of a lot of questions I end up having about things.