I'm sorry you have to deal with that. My husband has done that to me on occasion. He has thought before that if I just think positively I can pull myself out of the deep dark depression...unfortunately it doesn't work like that. He knows that now, going through his own depression and issues, but for him it was more of a fear response. He didn't want to see me in that condition.
I don't know how old your mother is but there are generational differences in how things are perceived. My mother In Law thankfully keeps her opinions to herself but I know she feels the same way based on things she has said about my sister in law (also BP) in the past. Kind of the pull yourself up by your bootstraps mentality. I'm just sorry you have to live with it. I hope you are able to find a way out soon.