take somebody into your confidence

take (someone) into (one's) confidence

To tell someone information with the understanding that he or she will not reveal what was said. Daniel, we've taken you into our confidence to discuss the direction of the company, and where we see you fitting into it. You're the only person I've taken into my confidence about this, so please don't discuss it with anyone else.
See also: confidence, take

take somebody into your ˈconfidence

tell somebody your secret plans, problems, etc: She’s the only person I’ve taken into my confidence about it.