Kato,
My wife is Bipolar I, believe me, I know very well the stress and pain you are describing. If you want to talk...lemme know. If not, that's fine too. Best advice I can give is separate the disease from the person. It's tough, and sometimes, even I find myself stressed out, frustrated and probably cursing and drinking more than I should, ask Chico and FF...I am not the most pleasant person when she's been hospitalized.
Being frustrated and upset isn't wrong..it's a natural reaction for guys like us. We want to do something...but we know we can't. So, we do the best we can. I do, and as much as the bad times suck...the good times are when I get to smile and realize why I said I do in the first place. My folks call me a saint. I dunno why, I'm not. I just love my wife and I'm as the song says: "And you're too proud to beg and too dumb to steal".