Keeping a secret is easy until it would make you interesting. That’s when it counts.

Discretion is never tested while the information is dull. The pressure arrives when the secret acquires social value: a group leaning in, a gap in the conversation, something you could say that would make you briefly the most interesting person there. Every argument for telling arrives dressed as something else, usually concern.

Notice the pull of wanting to be interesting and treat it as the signal rather than the reward. When it arrives, say nothing and let the moment pass to somebody else. Being dull in that one situation is why people tell you things for the rest of your life.