And the problem is?
You do know it's okay to be atheist. It's okay to not believe. It's okay to ignore people who believe.
If you are truly bothered by Christians, maybe you are being dishonest to them by not telling them you do not care for it. Just tell them you don't believe. If they continue to nag you, tell them you'd like to share your non-belief with them if they want to trade otherwise you are happy as a non-believer.
True Christians will not get into your face. They will not care whether you believe or not. Just like true atheists will not care if you don't believe. Don't make such a big deal out of something that isn't. I don't like people who throw their beliefs and religion at me. I find that odd that anyone would want to do that but I don't let it get to me because I'm strong in my faith. So, if you're strong in your non-faith, then it shouldn't bother you. For some reason you seem really bothered by Christianity so maybe there's a bit of you that doubt your non-belief so much that you might even think you might believe. That's okay too. You don't have to be 100% believer, and you can also believe 100%, but deny it for the sake of denying, I guess. It's your life so be honest with yourself. That's all that matters.