My mom wants to move to Austin, TX from Kansas City, MO but I don't, What should I do?

She wants to move so she can get married but I want to finish school in Kansas City first. I've already talked to her about 100 times about it but she doesn't seem to care. I've currently going to therapy and I'm 16 so of course shes always saying "Im the parent". I feel that shes putting her fiancee over me by making this move and shes only thinking about herself. I have very good friends in KC that I don't want to leave but then again, she doesn't seem to care. This is tearing me apart! What should I do?