HI Thank for asking to HCM I can understand your problem, it is really hard to deal with the parson having bipolar disorders, but you keep trying to make him happy, try to brnig the confident of him back, give him great hope, make him understand how life is important, and how much it is colorful, of course it is not easy going and for that first you need to find out for what he has such problem, have open dialogue with him some time we are not fully aware about the inconvenience the person have because of us, and in such situation he/she may not be able to tell us about this and ultimately becomes the victim of such disease, take care of him have nice day.