I can't tell my family about my debilitating depression because of my bpd sister
How does your sister have anything to do with your depression?
I moved out a while ago because I can't deal with my sister. I don't want to get my mom's hopes up, she still thinks I'm coming back.
Sorry you are dealing with depression. You shouldn't let your sister's mental illness keep you from talking about your problems with your family. Do you think being isolated from your family might be making your feelings of depression and loneliness worse?
It's just a phase and I don't have that kind of problem. I am sure I will be fine.
Everyone needs someone to talk to. It is best that you choose someone to trust with your thoughts.