I'm sorry to hear you are going through that and the people around you haven't been supportive.
Are you still at school? Is there any chance you can speak with your school counsellor? They might be able to give you some advice and even help you talk to your parents about what you have been going through. You shouldn't have to be doing this alone

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Also, if you ever want to talk please feel free to contact me any time. I'm always happy to listen. Sometimes just being able to vent and talk to someone neutral can help.