From NAMI:

People with BPD experience wide mood swings and can display a great sense of instability and insecurity. Signs and symptoms may include:

Frantic efforts to avoid being abandoned by friends and family.
Unstable personal relationships that alternate between idealization—“I’m so in love!”—and devaluation—“I hate her.” This is also sometimes known as "splitting."
Distorted and unstable self-image, which affects moods, values, opinions, goals and relationships.
Impulsive behaviors that can have dangerous outcomes, such as excessive spending, unsafe sex, substance abuse or reckless driving.
Suicidal and self-harming behavior.
Periods of intense depressed mood, irritability or anxiety lasting a few hours to a few days.
Chronic feelings of boredom or emptiness.
Inappropriate, intense or uncontrollable anger—often followed by shame and guilt.
Dissociative feelings—disconnecting from your thoughts or sense of identity, or “out of body” type of feelings—and stress-related paranoid thoughts. Severe cases of stress can also lead to brief psychotic episodes.
- See more at: https://www.nami.org/Learn-More/Ment....imz7d0Tw.dpuf