Oh my goodness! Please, for the sake of God, help me! This is a serious question that has to do with my life!?

I know I am about to use mildly fowl language and I might get reported for this but as of right now, I don't care!!! I am under so much stress and worry that I can't think right!!! My mother and father are on the edge!!! My father is so mean to my mother!!! I can't stand it. WITH EVERY WORD AND EVERYTHING MY FATHER FIGHTS AND CUSSES AT HER!!! I can't stand this. My mother wants to kill herself over this!!! And I, myself agree that he is sooo cruel to her. She been through so much **** it's not even funny! I want to defend her but I am afraid of him. He loves me dearly, he says I am his everything but I don't want to becaome his nothing. Please help me, they are going to seperate probably. I don't know what to do. I can't live without either one of them. And to see them fight hurts me like a bullet going through my heart. What the hell do I do?!