Home » Borderline Personality Disorder. The symptoms of Borderline Personality Disorder can be summarized as instability in mood, thinking, behavior, personal relations, and self-image.Individuals with the disorder may: 1  demand constant attention and make unreasonable demands. 2  avoid being alone by acting out a crisis or dramatizing a problem.ome » Borderline Personality Disorder. The symptoms of Borderline Personality Disorder can be summarized as instability in mood, thinking, behavior, personal relations, and self-image.