I am a immigrant abused minor, what can I do to legally leave my family?

You're too old to obtain US citizenship through adoption, which must be completed by the child's 16th birthday and after the child has lived with the adoptive family for two years preceding the adoption. If you are being physically abused, you can phone Child Protective Services or the agency in your state which handles health and safety concerns for minors. When you return to school in the fall, you can talk with your school's guidance counselor.