Trust is the thing that takes a lot of effort and time to build up. It needs to overcome enough challenges to put a faith in one person.
But to destroy it, it only takes a very small lie, or even a harmless lie.
Because when you put your faith in someone, you don’t just believe in their actions and words. You also believe in their personalities and their dignity.
So when you realize they have lied to you, you have a feeling that the trust you gave has been built or developed based on lies. You doubt everything they say and do.
You doubt your own beliefs. The more you have trusted them, the more you will collapse, the more your hurt. That is the feeling of being betrayed.