Should I move to Florida with my aunt and uncle?

My Aunt and Uncle are moving to Florida in November, and I went down there with them a few months ago for the first time and loved it soo much. I loved the atomosphere, the people, the beach, EVERYTHING :), currently live with my Mom, her boyfriend, and my older brother. Long story short, her boyfriend and I do not get along. He points out all of the little things I do wrong and makes my life a living hell. If I had the choice, I would move in with my dad, but he died 4 years ago when I was 12. My mom loves her boyfriend, but she's getting fed up with him too. While we were in Florida, my aunt mentioned to me that if I ever needed a place to stay, I am always welcome to live with them. I'm so torn. I love my mom and brother to death and would miss them so much, but her boyfriend gets me so upset that I feel like I could just leave Illinois and never look back. Should I stay or should I go? :(