I Feel Very Frustrated and Angry

Tonight has been very difficult for me. She's been walking to the kitchen window and back to the living room windows for almost one hour. I've tried every trick and diversion to get her to just sit down. I could hear her breathing hard and there is nothing I can do. I'm trying my best to get her into her nightly routine of brushing her teeth, washing her face and getting her dressed which generally takes almost two hours. Tonight will be a three-hour routine. She is just so stubborn tonight. I had to just walk away and yell at the top of my lungs. It’s true that most caregivers will probably die before their love ones. Tonight has been one of those nights when I just don’t have the will power and patience to continue this 5-year journey. God, please help me.