I'm 14 and I really want to run away from home... how?

So even though things are 10x better at my dads house, the mediator for my parents divorce is putting me full time with my mum. I've told them both that if one person takes me away from the other, I'd run away. And so here we are. I think theyve forgotten, and im not sure thats whats happening, but I'm trying to make a plan... and I know I know, its a bad idea or whatever, but NO ONE controls my life, no one but me. And i know its the law, but this is my own personal law. So no "you shouldnt" or anything, just.... help?