The first time I've dealt with ABDL desires and practices, I swore to myself I would carry this secret to the grave. It was the simple solution to the problem "what others will think?". If no one knows, no one can have an opinion about it. But this has a small side effect: the more you hide and suppress, the more you confirm to yourself these practices are shameful and wrong. Because people usually hide things that are bad, not good. You are convincing yourself that, indeed, you shouldn't be doing any of that.
After some time, I couldn't hold it anymore. I needed someone to talk about it. I told a friend that don't live close to me, and it was a blessing. She was supportive from day one. Over the years, she tried to convince me that, no, it's not wrong, nor shameful, and I'm a perfectly acceptable human being that is a lot of different things, not only an ABDL. And I would love to believe that, but my brain, tainted by years of shameful conditioning, couldn't believe. Maybe it was just her. She was weird because she thought that I wasn't weird.
Guess what? I told another friend. This time, a guy, and one who I regularly see. The reaction: largely the same. He knows me for years and accepted this as naturally as if we were talking about the weather (his words).
My conclusion: if you want to be more open, go for it. Just remember to be smart and sensible about who you are going to open up with. And how. Choose carefully, although it's pretty easy to know the ones that never are going to accept. And if it's sexual to you, no need to enter in details. I would say "no need to enter in details" in general.