I dealt with a person like this at my current job. It was driving me crazy, I ended up talking to someone about it. They told me that I should write a list of reasons why I should "thank" this person. At first I was appalled. "Thank a person whom is rude on a daily basis and makes my job and my life miserable?" So I sat down, I wrote about how much more I value being empathetic to patients (she retaliated against patients she found rude). This individual had a phenomenal set of skills, but she didn't have the warm personality to match. So I said, I'm thankful for her showing me her tricks that she's learned, and that when I finish my degree, and I'm as skilled as her, that I want to be more down to earth. Maybe it will be helpful for you to also write a "Thank You" list to your bully. It has certainly made me a better professional.