I don't know how old you are, but I can give you my experience. I'm 20 and in college, so I live on my own but am still dependent on my parents in part financially, and I am on their insurance.
When I told my parents I had bipolar disorder (which took me two years to work up the courage to do), they asked how they could help. I tried to explain to them that there truly is nothing they can do. I asked that they just be patient with me. Sometimes my mom gets frustrated with me when I do poorly in school (she's afraid I'll lose my scholarship) or annoyed with me when I'm home but I stay locked up in my room and sleep a lot rather than interacting with the family. I told her I know those are valid concerns, but those are also symptoms of my mental illness and it would help if she could be patient and understanding.