I want to cut my mother out of my life but she has no one else.
That's awful. Why do you want to cut your mother out of your life?
She is a very arrogant person who keeps coming back to my life after she keeps breaking my heart over and over again.
I see why you would be considering doing this with your mom. When someone is toxic you should do this in order to help yourself feel better.
I don't care if I upset her anymore, she deserves what's coming to her.
It is difficult but you have to do what is right for you. And if cutting your mother out will make your life better than you should do it.