How much should I trust other people?

I don’t usually trust people but then I trust certain people but then I see them lying sometimes. For instant, there is this recreational therapist. And she was helping people but then she stop working as soon as she settle down with her career. She is full of shit. She lied that she is friendly and helping. All she cares about is her job security. I feel deceived. I am like I should trust no one now.

How much should I trust other people?
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