Ariel Gave Up A Lot
She gave up her family, the use of breathing under and over water, her tail, her voice, her sea friends. She battled Ursula, Almost lost her father, Risked her secret of being caught to save a human, had her entire collection of human possesions blown up, went to save Eric (again) when he couldn't breathe under water and was about to turn into bubbles, was yelled at by her father, didn't follow his rules, and trusted the sea witch
And For What?
So her prince could find another girl ?