Your loyalty is measured by everything you heard and never repeated.

Reliability with information is invisible when it works, which is why people underrate it in themselves. Nobody thanks you for the story you did not pass on, and no one knows how many times you had something interesting and kept it. That silence is the actual substance of being trusted.

Think about whatever you are currently holding for someone. Notice the small pull to share a piece of it as context, or as a joke, or with just one person. Letting that pull pass, again, is the whole practice. People eventually work out that you never did.