Seeing wolf mentioned my name, i feel that i need to contribute.......
I am very poor at Psychiatry, always have been and always will been, but luckily have never had to confront the conditions.
For what it is worth, one would need greater evidence than what you have described to support a diagnosis of bi polar and i would suggest that the link supplied by wolf may be read and digested.
Mood swings, inability to maintain a relationship at work and at play, not wanting to get up in the morning, no interest in life and living in that "black hole."
No I cannot help any further only to say that one would need greater evidence that you have produced, to support a diagnosis of bi-polar.