Nineteen-year-old ryland thinks to herself, "i'll never find someone to love. i'll be old and gray and all alone." this is an example of

This is an example of "maladaptive cognition".

Maladaptive cognition refers to the thinking which is not correct and logically or rationally not supported, like in the given example Ryland is only 19 years old and she is young, having a lifetime to find people but the she thinks otherwise.