Trust may be a simple word but by no means is it an easy fiat. Trusting someone takes time and sometimes even after knowing someone for ages, they can still violate your trust.
Has anyone ever told you "Trust me," and then didn't prove themselves to be trustworthy? How about someone you trusted, totally violated your trust and left you with a broken heart? How about learning to eventually learning to trust someone only to find out everything they told you was a lie and everything you thought was the truth was a lie?
Those are all difficult situations to be in. Sadly, there isn't a foolproof way to prevent this from happening. People are people at the end of the day and they will make mistakes. I think the best thing to do is to give people grace first and then go from there.
Reflect on your own actions. Have you ever been untrustworthy? Have you ever