Why is my uncle doing this to me?

Tell your father or someone that can protect you. Then definately call the cops. You should get a restraining order against your uncle as soon as possible. A restarining order will make it so if he comes near you, your house, or even sends you a text then he will go to jail. A restraining order will be for your protection. To get a restraining order just go to the police department with your phone and messages and tell them that you want to get a restraining order. Dont tell your uncle that you are going to do that. Keep all the messages, pictures, and everything that you have against him for court.