Does my friend have bipolar or a mental health disorder?

That isn;t Bipolar.... sounds a lot like Borderline Personality Disorder though.... Bipolar moods last for weeks or months and only change 2 or 3 times a year... and they are much more severe than that... Borderline moods change like the wind... also common with borderline is when someone likes you one minute then hates you the next then loves you the next.....