The right decision

First let me say that I love my job. But I am not appreciated by my boss at all. She brags to her co workers and her boss about my work ethics. She even praises me in front of her audience at the time. When she does not have anyone around she talks to me like I am a piece of dirt. She talks about me like I was the worse employee she ever has had in her professional life (she talks about akll her staff & my nurses work hard, so I am not the only one). Anyone and everyone has told me that out of all her Deparment Assistants (DA) I am the best. However she does not show this side to me. She supports me with school and that is it. An higher up staff memeber told me to apply for a position at northlake because she knows how mt boss is(My boss is called the hospital nurse and DA supplier, because everyone quits or go to another unit). I was interviewed last week for another position here at the hospital for what I do now. I was offered the job on the spot. I did not tell my boss due tome not knowing if I was going to take the job. Well she found out and told me to post my position so that she could hire someone promptly. I advised her that I have not accepted the position. She then wanted to talk to me. Mind you she was on vacation this past week and this happened Friday. She came into work Friday afternoon and we sat down and talk. I told her how I felt. I did not hold anything back, because I had another job if she got upset. Well she begged me to stay. I told her I would. I wonder if I made the correct decision by doing this. I know more abuse and hatred will come my way from her but I love my job and my staff. I hope the fact of loosing me made her open her eyes and see what she has in front of her. I will accept any advice in this matter.