Hi,,I Have Been Dating A Woman Who Is Near Fifty,,we

Hi,,I have been dating a woman who is near fifty,,we have dated for over two years,,through this time we have split up many times usually this will happen without fail every three months,,there has been times where we have dinner every thing is great , go to bed,, by morning she will have changed her whole out look on our realationship, claiming that she doesnt want the realationship anymore,,that Im too old for her ( Im ten years older than her) I also have noticed that she spends a lot of money on shoes and clothes,,which she can never wear,,some items still have price tags on them,,,In my heart I feel like there is something wrong but I cannot say anything to her because she gets very upset,,,