Our expert says:
From your description, she does indeed sound depressed, and in need of treatment. She's right, of course, about needing also ( hence CBT !) to get her thinking straight, but obviously she is, like most of us, unable to do that entirely on her own. its not a matter of inducing or learning positive thinking, as unlearning the habir of negative thinking.
Not knowing the people involved, or her relationships, I don't know whether her mother, or pastor, could help to convince her. You'd be in a better position to guess that. Otherwise, persist gently in the way you have begun, which, among other effects, reminds her that there ARE some caring people in the world.
And having, in the past, had 2 cats murdered by a icious local gardener, I know that her anguish could be considerable.
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