My grandmother was diagnosed with clinical depression. She was a big partier, so maybe today she would have been considered bp. Anyway, she refused to take meds most of the time and she was a very mean and demanding person! Actually, she was just plain scary because you never knew what mood she would be in. She was an alcoholic as well.
So back to your question, do I think bipolar is just situational-maybe, but mential illness no matter which label it has is very miserable, especially if you choose to make others suffer.
Bluemountains