Is it a mistake to confide in your partners? F22 M18

My ex and I broke up on bad terms and I’ve been reflecting a lot on it. One big feature about the relationship was that I confided in him about all my betrayals, dark moments, insecurities everything. He was always there for me to listen, and I did the same for him.

Days before the break up I started feeling like maybe it would be best to call it off because I’ve shared too much and he has too much ammunition. Maybe it would be better to start over for a new guy and present a better image to him. For example, he made a joke about me being bad at math. He only knew that bc was vulnerable and humble enough with him to let him tutor me for a big exam at the beginning of the relationship.

Eventually the break up happened and he let loose a ton of insults and all of them related to painful experiences I told him about. I told him about the time I friendzoned a guy and he insulted me by calling me immature, so he called me immature. I vented to him about how no matter how humble and dutiful I try to be, my parents still call me spoiled, so he called me spoiled.

I wasn’t rlly blindsided because it wouldn’t be the first time someone weaponized sensitive info against me . I’m pretty used to thinking my relationship with someone is fine, and the they one day blow up about things that I never realized were a problem.

I’m starting to think that you can’t truly be vulnerable with anyone.