can i transfer high schools?

i live with my mom and my step dad and i am very unhappy in our living situations. we get into so many arguments and just its an uncomfortable living enviroment. i dont get enough credit or support in anythig that i do. i would like to move in with my dad but because he lives in a very bad town, the court wont approve. so this is what im asking.. im a 15 year old sophomore with a 3.5 GPA and i would like to know if theres any way i could transfer to my cousins high school and move in with them full-time? their school system is alot better than my father's and its also in the same state as my current school. what are the guidelines for this to take action? i am serious about this change, i have thought long and hard about this.. its something that i need to do. please help!!! thanks!(: