Depression Treatment Care

my exboyfriend of 2 years was very very depressed, he was put on antidpressants and now feels like there’s this great big world out there..i feel that there is a good chance he is bipolar and was misdiagnosed as just being depressed…my dad is bipolar and he and my ex have very similar personality qualities and i have also heard that when misdiagnosed for depression, upon taking antidepressants it can switch you from depression to you’re manic state if you are bipolar… before my ex and i broke up he tried convincing me that i was depressed..when really, i’m not at all..i’ve seen a physciatrist b/c of a court order from my parents divorce and they have told me i have no mental illnesses and that i am a very happy person..which i am, very much so…why would my ex try to tell me otherwise?