[ThisWillDestroyYou]

I don't think there's a reason to tell your parents. It's one thing if you're being oppressed, but a lot of times avoiding he topic is best to avoid conflict since everyone is entitled to their own opinions. It really boils down to how religious your family is and how tolerant they are. Personally, I'd keep it to myself. Especially in my teenage years. In fact, I did. You're still developing a sense of who you are, and your own philosophies and religion. It's all subject to drastic change. I'd wait to bring it up. I'd also look into some support groups at your school for freedom from religion. It may help you find others to associate with that you can open up to, assuming you're from the states.