While I kind of agree with Skrypt, I think what you need to do is sit down with your parents, both of them, and calmly explain why you feel you would like to move in with your mom. Try saying how you feel in a manner such as, "Since the divorce it has been very difficult for me, living at one house or the other. I really think it would be best for me to stay in one home from now on, and I would like to stay with my mom..." you could add to your dad that you feel more comfortable at your moms place, but make sure he knows that you still love him and respect him AND want to see him, but you need a permanent place to rest your head.
The only other thing is stick to your guns. Discuss it with your mother first, make sure that she is aware of the fact that you want to live with her. Don't let your dad try to sway your decision - stay firm but gentle. Explain that this is what you feel would be best for you at this time. I've had some experience trying to tell my dad I didn't want to live with him, I can only say I hope this works for you and you find a resonable and comfortable solution. Good luck
