The only time I really ever disclose now is for a job and that's if I feel like I'm struggling. I'm mild now as well and well sometimes it can be obvious other times its not. You don't have to tell others if you do t feel like it. I have a few I have told and they support me when I stutter otherwise those I've met in recent years I don't talk to about it. If you don't feel like it's an issue then it isn't and most ppl will just continue on