Currently my friends do not know that I'm abdl but they do know I'm a brony and are fine with that because half of them are Bronies themselves or reference it at times, I know my best friend has a fetish but won't tell me and he might know I have a fetish but I won't tell him. There's a chance he might be ABDL as well because he sometimes jokes about people who have diaper fetishes, probably to act as if he isn't one.
I plan on telling him when I get an opportunity for the situation where we would tell each other our fetishes if we promise we will both say ours to each other's and not chicken out, and also make sure we keep them a secret.
I guess things would be much better if we knew about and tolerated each-others fetishes so I could openly talk about it to someone in real life.
What's your situation with your friends or family and ABDLism.