Well, I know this is old so don't get mad at me if I revived it, but the subject matter is deeply personal to me and I would like to share it.
I have bipolar disorder, probably had it my whole life. It got very severe in the past year, I was finally diagnosed in November. How do I deal with it: I talk to my doctor very frequently and take my medication. It's very hard, I lost out on a fellowship opportunity because of a hospitalization, made me feel like a total loser and failure, completely obliterated my self confidence. Gained weight because of my meds, about 20lbs. I still have days with certain ideations that I'd rather not discuss here because they can be very scary. I just practice a great deal of self control. Most people who know me wouldn't guess I was bipolar, but when I am alone I let lose and act like a maniac ;). The biggest thing is staying on medications and reminding yourself that the disease is not going to win.
My mom has severe dementia from multiple sclerosis. It is very, very hard dealing with her. She has no short term memory and she is starting to lose her long term memory too. Last we she forgot my sister had freckles and asked her where she got them - she's had them since she was 2. The biggest problem with her is that she is completely uncooperative and in complete denial about her illness. She believes she can drive a car when she has been bed ridden for the past three years and cannot go to the bathroom on her own. Whenever I am home I basically have to help her to the bathroom and shower her, fun. It doesn't help that she can be extremely nasty, cursing either me or my father out if she doesn't get her "way". In many ways, she is like a handicapped 4 year old. So how do we cope with it, I got away as far and as fast as I could. The situation was toxic. My sister did the same. I felt bad leaving my dad behind, but he was so reluctant to apply for full time medical care that he brought on many of his own troubles. It is very tough and a situation that I avoid as much as possible.
In addition to that, both my parents have some kind of personality disorder. It made my childhood very surreal and emotionally disturbing. I coped with it by immersing myself in strategy games. I taught myself how to make maps for command and conquer, I made a few specially scripted maps (I would like to brag here and say I made the hardest "Art of Defense" style maps in the game ;) ) and I taught myself how to mod the game from inside out. I basically played Cnc Generals:ZH for 5 years and got very proficient at every aspect of the game. While those days have passed, I still feel a little bit of an attachment to that game. When I left for college I focused on my passion for aerodynamics and taught myself a great deal outside of the normal course schedule. I missed out on a lot growing up, which still bothers me, but I made it through.
Overall, it has been a rough ride. What I can say is that the more troubling experiences you have, the more callous it makes you resulting in an "immunity" to distress. It also makes for a great deal of wisdom and certain respect for life that many do no acquire until much later.
It must be tough being schizophrenic, especially since his prognosis seems very negative. Make sure "Bob" gets good medication, visit him often and provide the necessary emotional support. That can be a life saver.