But let's face it: Understanding me-I mean, really understanding me and my nutty life-isn't so easy. That's why it's so hard for me to find people I can trust. The truth is, I don't know who I can trust. So mostly I don't trust anybody. Except my mom, Jules. {Most of the time, anyway.}
In the passage, the narrator admits that truly understanding their complex and chaotic life is challenging, which makes trusting others difficult. They often find it hard to identify who they can rely on, leading to a general sense of mistrust toward most people.
The exception is the narrator's mom, Jules, whom they typically trust most of the time. This highlights a close, dependable relationship with their mother amidst the narrator's overall struggles with trust.