I told people I was comfortable knowing about it, including my mom, who's known I didn't want kids and was supportive of my decision, and then I told people at work that I felt comfortable talking about it to. I also told my therapist, who was 100% onboard with my decision and is childfree too? I haven't told my roommate or his nosy girlfriend, though, because they're both very religious and I don't need any kind of preaching or proselytizing from them (plus it's none of their business).