I want to die, and never see anyone again....?

I have been severly depressed for the last 2 years. Dealing with anorexia, and cutting. No one knows any of this. But lately, i have been just staying in bed, laying there. Whenever i start moving i get a headache. Im 17 in my senior year in high school. I can't take anything anymore. And now i might not even p for this year, which means i might be taking my senior year again. Which will be terrible for me. My parents are constantly calling me a failure. And i can't take that anymore. I miss every other day of school, and putting myself deaper and deaper into failing for the year, i can't even walk downstairs without going even more insane, my mom yells at me everytime i see her, and its driving me more insane. I don't know what to do anymore. Any help?