What should I do if I have stopped believing?

My parents are devout Christians and it just doesn't make sense to me anymore. I have to go to church 3x/week and my parents even pulled me out of school and are going to let a shitty computer program teach me high school all because anything created by God that is fun must be of the devil (Right of schedule btw). If I tell them they will likely take away ALL my appliances and ****. But I've been hiding it for almost a year and its eating away my insides. I've decided I'd rather not live a lie than have computer and TV access. What's the lightest way to let them down. I've been giving hints for a while that the O.T. is violent and barbaric and I never want to go to church, but there not getting the whole message. They say often that I'm possessed by demons because I don't advocate the O.T. beating salves or kill hundreds of thousands of people because they hadn't properly "guessed" the correct religion.