You trying to change her mind, is just like us trying to change your mind to leave this relationship.

People dont change unless and until they have to. They dont move from their position until it gets to uncomfortable to stay.

She has you taking care of her. She will continue doing what she wants. No reason not to.

Plus, its a free country. Who are you to tell her that you are right and she is wrong? Similarly, who am i to tell you that i am right and you are wrong to stay with her? See what i mean? We are all free to choose how we want to live. So... choose how YOU want to live. Figure out what it costs you to stay with her the way she is.