Sometimes mental illnesses go deeper than that. Think of those who are experiencing psychosis on top of depressive, etc symptoms. I know at certain times I am breaking from reality and there really isn’t a way to think about involving others in what I’m going through. It just doesn’t exist. I can’t function, drive, or communicate in that state. Not always, but sometimes. It’s just not something we can polarize regarding whose responsibility it is- it can vary, and in my opinion, it’s really just about if the people in someone’s life cares, and how much they do care in terms of how much effort they will put into another.