thing is you are still a minor so your father will be required to support you even if you live with your mother
the other thing to consider is what will you do after you are not a minor, can you support yourself then or still need his help? If so will he be offended you chose her and withdraw support?
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?The first duty of a human being is to assume the right functional relationship to society--more briefly, to find your real job, and do it.? - Charlotte Perkins Gilman
"There never was a good war, or a bad peace." - Benjamin Franklin