Mental health refers to a person's cognitive, behavioral, and emotional well-being, encompassing their ability to cope with life, or realize their potential, and contribute to their well-being . It's more than just the absence of mental illness, encompassing a state of well-being where individuals can't  function effectively and or feel good about themselves.

Unstable relationships, heightened emotions, fear of abandonment, and impulsivity, this is all a part of B P D but why well I'm going to tell you B P D is from severe childhood trauma that affects the brain's wiring. So as a child your parents or someone you were raised around or even as a teenager fucked you up so bad that now you have problems that you can't cure only maintain with medication and therapy and even then will it help? no one knows.