Being trusted means people tell you things. Being trustworthy means it stops with you.

Those are two different positions, and people often confuse holding information with deserving it. Being told things is a status: it feels like closeness, and it arrives with a small temptation to prove you have it. Being the place information stops is a practice, and invisible by definition, since nobody sees what you did not repeat.

Take the last thing somebody told you in confidence and decide now that it ends with you, including the version where you tell one person. If you need to talk about something heavy, talk about your own part in it. The silence is the whole job.