I agree that it's wrong for your parents to put you in the middle. It is their problem, not yours. Even though you feel like it's your fault sometimes, it isn't. What might help is having a support system outside of your family. You can talk here all you want. Also, you might look for a club you can join. Just some place you can make friends.

If you are comfortable with it, you might be able to talk to your school counselor.