[ThisWillDestroyYou]

Personally, I found in my case it didn't make a difference. My family did, initially, become a little more pushy with religion, but nothing overbearing. This said, everyone's family is very different. You'll be the best judge of your parents reaction, and you can base your decision on that. I'd also say it depends on how old you are. If you are out on your own, or nearly out on your own, then it won't make much of a difference (this is when I did it). But if you still live with them, as you're line of thinking goes, you still need to be wary that your relationship may change and be worse than if you just kept quiet to begin with. Religion, or lack thereof, never defines us. It's only a part of us. We don't need to distinguish ourselves as atheist or Mormon. We're humans. Your sense of belonging isn't identifying as an atheist. Your sense of belong is finding a definition of family, and creating that family for yourself. It can be in an atheist support group, it can be your personal family, or it can be your friends. But, as I've said, I find separating yourself from a 'title' to remove that need of 'belonging' is more ideal. In another thread similar to this I mentioned that religion, at least to me, tended to matter less and less with age. Meaning, it doesn't matter that I'm an atheist and my family is Christian. I don't care what religion anyone is, including myself. I think adopting this mentality is helpful and prevents a lot of drama, pain, and possibly war. It's great that you know you're an atheist, presently. But this may change, it may not change. You never know. So existentially I find it's not really worthwhile identifying as one thing or another.

I hope that makes sense. If you ever need someone to talk to, I'm here. The main thing I hope you know is that I was raised Christian (baptist), and went through a religious identity crisis. I was Christian, atheist, agnostic, dabbled with Buddhism, deism, ignosticism, agnostic deist, weak atheism, so on and so forth. What I found was that in those stages, my religious identity really didn't affect who I was. It felt like the world to me at various times, but looking back, it's not that big of a deal. And so for people who it IS a big deal, sometimes I think it's just better to not talk about it. But really, only you know if that's the best decision for you based on your family and how well you can psychologically deal with it.