I'll do my best to help, since others have been helping me with my situation. And I'm qualified-a professional who deals with BPD daily. Here are my thoughts on the diff between MLC and BPD
MLC-short to mid range duration, previous normal functioning, most relationships not affected, functioning in most other areas of life (work, play, etc) is minimally affected. Usually has a definitive end point.
BPD-longer duration, functioning has usually been impaired from late childhood on, occurs most often in females, affects every relationship they've ever had (which are usually intense, and then short-lived once the other person gets tired of the mood swings and intensity), impairs other areas of life (they get in trouble at work for whatever reason), has other impulsive behaviors present (shopping, sex, eating, etc).
BPD is described clinically as someone that is on the borderline between neurosis (extremely anxious) and psychosis (not in touch with reality). Thus the origin of the term, and it is very descriptive of the individual. Individuals suffering from BPD are actually very interesting at first glance. They make great conversationalists at parties, great lovers, and interesting people in general. However, over time, they wear on your nerves with their alternating demanding and then threatening. They have an intense fear of abandonment, yet push most people away due to lack of intimacy skills (thus the reason they make great sex partners but terrible long term mates).
