Which disorder is characterized by a pervasive pattern of unstable relationships and self-image?

The disorder characterized by a pervasive pattern of unstable relationships and self-image is indeed borderline personality disorder. This condition is marked by significant emotional instability, impulsive behaviors, and a distorted self-image. Individuals with borderline personality disorder often experience intense episodes of anger, depression, and anxiety, leading to difficulties in maintaining healthy and stable interpersonal relationships. They may have a fear of abandonment and often feel empty or unsure of their identity.

In contrast, bipolar disorder involves significant mood swings that include episodes of mania and depression, but it does not primarily focus on unstable relationships and self-image. Generalized anxiety disorder is characterized by excessive worry and anxiety about various aspects of life, while social anxiety disorder specifically involves fear of social situations and interactions. Neither of these anxiety disorders captures the instability in relationships or self-conception that defines borderline personality disorder.