Has anyone moved out of state with their child-above the law?

I would like to move out of state with my child in the future and am trying to set the right course of action. I know the laws that pertain to this matter and think that the father will fight me(and probably win,like always). If I moved, would he be able to somehow legally make me return to this state? We were never married, had a short relationship, and I am the custodial parent. I do everything in the best interest of my child. Any advice on how to get around the law in trying to move to a different state?