What you want to ask is the question "Why doesn't dad like me"? Obviously, I do everything better than my sister " Maybe it's because your sister is not your own, so you should show more love to your sister, for fear that your sister will have the idea that she is not your own. Just like the child of a policewoman in Ten Deaths gets into trouble, a policewoman will only beat her own. But you must believe that your father must love you, but he may just show it in different ways.