Should I run away or live with my dad?

Well, here's the deal. I've lived with my mum ever since I was a baby, and never with my dad as they were never married, they only lived together, but then my dad moved to Spain.. but I still have contact with him. Anyways, I actually HATE my mum. I am fed up of her, she is a terrible mother to me. First of all, she thinks I'm a joke basically. She makes fun of me all the time. I go to the drama club at my school, and when I got picked for the lead role in our production, I couldn't wait to tell her. I ran home and told her, but she just laughed and said "You'll let them down." She didn't come to the production, and that night I had to be driven home by a teacher. Everyone that night asked me why she wasn't there, and I had to make stuff up. Every time I achieve something at school, she just laughs, and never congratulates me. She says I'm ugly, greedy, a fat pig, an idiot, and many other things. Every time I get dressed, she says I look terrible and I should wear what she tells me to. However I have my hair, she says it looks a mess. She says "Can I do your hair for you, so you don't look like a scruff?" And when I try and politely tell her "No mum, I'm 15." She says "YOU HATE ME DON'T YOU?!". Every meal she makes me, she tells me to eat it all. If I leave one bit, she hits me. I'm short for my age, I'm 4'11 and I weight 6 stone 3 llb. A few years ago, she made me switch bedrooms with her. I was passive, and moved bedrooms. Then, 6months later, she made me move again because she had a new tv and it didn't fit with the way her furniture was arranged. she made us switch rooms yet again, and I was quite annoyed since I'd just settled in, decorated and personalized my room. THEN, my mum made me move again because she 'didn't like the feel' of the room. I was quite annoyed at this, and I said 'Look, when do I ever get a choice in these decisions?' she replied; 'Never. I'm the adult, you're the child.' She made me move schools because I got a ten minute detention in maths, for forgetting my homework. Baring in mind, the school I went to in the first place was a ten minute walk from my house. She has a car, but she doesn't drive me anywhere because she says if I do I'll get fat. The one I go to now is a 25-30 minute walk, and she makes me walk there every morning, and I have to be there for 8:40. I was quite annoyed when she made me move, because I had such good friends at my old school. There's a LOT more I could talk about. My friend Darcey just got back from Egypt, and she got me a little camel and a tobelerone from the airport. Over the course of today, I ate it all. I know I shouldn't have, ate the whole bar. but I did, and then my mom hit me, called me a fat *****, called all of her friends and told them what I did. Also, I went down from an A to a B in science at school. She grounded me for a month. During that month, my guy friend Joe came to my house. She chased him out of my garden, called up the family and said that I had sex with a guy, which is untrue. I'm absolutely sick of her being a controlling, assuming, lying mother who has nothing better to do than shout at me and call me names. I'm seriously considering running away, or living with my dad. The only problem is that my dad lives in spain.. I have no one else to go to, should I just run away?