My friend is the bossiest person on earth. How do I tell her and what do I do?

Ok, I have this friend, and we share a lot of the same qualities, so it's really easy to talk to her. But she has this endearing quality about getting everything she wants. We have this web show (if you ever wanna see it type in gurdy gets a makeover or gurdy gets a death threat) but I have been sick lately, and she asks if I want to film, and I tell her i can't cause I'm sick, and she gets mad at me. She is so hypercritical and rude to everyone. She thinks everyone is rude to her, when they're being nice. But she goes over-the-top with brutally honest comments, and doesn't think anything of it. I swear if I tell her that she's bossy, she'll totally kill me. What do I do?