Jordinsky, you may be able to get some advice from a local shelter dealing with abuse or teen issues. Even if you do not feel you should or have the option to move into a teen home, the staff there may be able to explain if your parents are within their rights in your state and what options you have locally.
Do you live in the United States? If you do and you leave your home, the McKinney Vinto Act may help you for your school situation. To sum up the point of the act, if a child needs to move out of their home, such as running away, having to couch surf, lives in a tent, winds up in foster/teen homes, etc, because of forced circumstances, the school where you have been attending cannot kick you out because you are no longer residing in that area. It has to be because of a harsh situation - not just a choice. If you leave because of any kind of abuse, you are probably covered. If your family moves into a tent because they think it would be cool, you are not covered under the act. This means you would have to tell school consoler, and you may need to tell them about the act. Some school staff are not aware of it, but it is federal and covers all public k-12 schools.
For others reading this post, if a whole family loses their home or has to move in with relatives, etc., the kids are covered under McKinney-VInto. Parents, don't think you have to change your kids school because of your living situation - if they can still get to that school, they can continue to attend.
In addition, under McKinney-Vinto you may be entitled to free school lunch and breakfast. If there are programs to help teens out in your area, you may be able to take advantage of them.
Your school district may have a homeless liaison or coordinator who can let you know what options you have. This person will not turn you into children's services automatically.
In my area, abuse and domestic violence are rampant. Our legal system cannot handle all of the teens who are fed up. Even then, the laws do not do enough to protect. In my day job, I have to explain McKinney-Vinto to kids each year. My school "gets it" and helps these kids. I have provided academic support to kids who couch surf at their friends homes, changing homes every few weeks rather than going back to the abuse and drama of their parents homes.
Although this may not sound easy, it maybe better than where you are at now. If your parents are unwilling to change, look at what other options exist to improve your situation.