Only a doctor can diagnose boyfriend. IMO, I wouldn't waste time with the GP, b/c they have inadequate training to diagnose/treat Bipolar Disorder. Plus, there's the fact that GP's will throw anti-depressants at you, not accounting for the mania that anti-depressants can induce. He should go to a psychiatrist first, and don't wait too long, b/c if left untreated, there could be a crisis, and you don't want to wait until then. Trust me.