Remember that all non-theists are not created equal (pardon my pun). You can be an ardent atheist or simply non-religion but believe that may be there is something more like a agnostic. Your views will probably change several times in your lifetime. You don't have to bring up your lack of faith to your parents , or anyone for that matter if your not comfortable discussing it with someone. I respect other people beliefs no mater how stupid they might be and I expect and seldom get the same back.
Hi Miami Amy, and welcome to this friendly meeting place with freethinkers like you who recognise that religion is a fraud aimed at controlling vulnerable superstitious people, including defenceless children; and
how tragic and inexcusable it is that women and minorities have been oppressed these last two thousand years and even longer.
Good luck letting them know. While I am open about my skepticism with my brother and sister, and before my mother died I'd voiced my doubts to her, I still would not consider allowing my extended family the knowledge of my opinions. My father was a godless heathen all his life to them, and for it he was basically cut off from any contact, other than polite hellos at special occasions. No longer having any parents, they're the only family left to me, so it's a difficult issue to approach, most certainly.