pour out (one's) soul (to someone)
To share one's deepest or most intimate emotions, thoughts, or secrets, especially in a profuse or sudden manner. Samantha poured out her soul to me last night about how grief-stricken she's been since her father passed away. Sorry for pouring out my soul like that. I've been keeping those feelings bottled up for a long time.
pour out one's soul
Fig. to confess something [to someone]; to reveal one's deepest concerns. Every time she calls me up, she takes an hour or more to pour out her soul.