My heart is broken," she goes. "It's turned to a piece of stone. I'm no good. That's what's as bad as anything, that I'm no good anymore.
The quote expresses profound sorrow and a sense of worthlessness, highlighting the emotional turmoil of the character. The individual feels that their heart, once capable of love and joy, has transformed into something hard and unfeeling, akin to stone. This transformation signifies a deep inner conflict and loss of self-esteem, suggesting that the character is grappling with feelings of inadequacy and despair.
In the context of Raymond Carver's "What We Talk...