Definitions...

Bipolar II Disorder is a bipolar spectrum disorder characterized by at least one hypomanic episode and at least one major depressive episode; with this disorder, depressive episodes are more frequent and more intense than manic episodes. It is believed to be underdiagnosed because hypomanic behavior often presents as incredibly high-functioning behavior...

Borderline personality disorder (BPD) is a personality disorder described as a prolonged disturbance of personality function characterized by depth and variability of moods. The disorder typically involves unusual levels of instability in mood; "black and white" thinking, or splitting; chaotic and unstable interpersonal relationships, self-image, identity, and behavior; as well as a disturbance in the individual's sense of self. In extreme cases, this disturbance in the sense of self can lead to periods of dissociation. These disturbances can have a pervasive negative impact on many or all of the psychosocial facets of life. This includes difficulties maintaining relationships in work, home and social settings. Attempted suicide and completed suicide are possible outcomes, especially without proper care and effective therapy...