I often just don't think of eating, and I seem to lack appetite. Even when I'm hungry I don't have much of an appetite, and could as easily eat sawdust. I worry a lot about my weight, and often say that if they would just invent something like Purina People Chow, life would be a lot easier in terms of eating, because I could just eat a cup or so a day, and not have to think about eating, planning what to eat, or shopping for groceries. I have an incredible aversion to grocery stores. Thank God my husband does all of the grocery shopping or I'd probably starve to death. I often am able to fast for a week or more at a time, and drink very little, especially at those times, as well. At risk of sounding melodramatic, I often think of starving myself. I imagine shrinking to nothingness. It works as a fantasy, but in reality it is incredibly difficult. I want you to know that this has been my thinking when deeply depressed. (I am also diagnosed bipolar.) I was once hospitalized because I'd stopped eating and drinking and another time spent an evening in the ER on an IV, because I hadn't been drinking anything. Severe dehydration and self starvation are somewhat difficult to hide from others in general, but people still are often in worse shape than I was before there is any intervention. In my case people were monitoring me more closely in the first place, because I'd been depressed and suicidal so I think that I wasn't in as bad a shape as I could have been. Still I must give attention to eating and drinking, because when particularly depressed I'm subject to persistnt thoughts of rewinding my existence through starvation and by denying my body other sustenance necessary for life.
I've found it very difficult to talk to people when I'm in these moods; it's hard enough talking to people in general. Sometimes when I try to talk to people about these things, I'm already so down that I can't comprehend why I would want to. With these kind of difficulties, sometimes the hardest part is knowing when/if you should ask for help. Perhaps in my own case it is a little easier, because I am actually attempting to harm myself through my actions. Sometimes though, a person is actually not aware of their motivation or are in denial, hopefully they have family or friends that are paying attention and intervene.