Whoever decided that we ‘learn to trust’ someone? I’d like to meet the guy who coined this phrase. It completely misses the mark. You don’t ‘learn to trust’. If I don’t trust you it is most likely because you haven’t given me any reason to trust you not because I have not ‘learned to trust’ people. Trust is something that is earned in the context of a relationship. It is something that is developed between two people, sometimes excruciatingly and frustratingly slowly and conversely (and most unfortunately) it can be smashed to smithereens in an instant.
It is not something that you study in school, take a test and then you know it for life like multiplication tables. That’s just not how it works.