There is no simple way. Atheists are fighting our acceptance in society.
All you can do is try to get along as best as possible. You don't need to convince anyone to turn atheist, it's better if you help other atheists be open about it.
Check out the group CFI (Center For Inquiry). They have local groups in most states and have different meetings, groups, and speakers.
Also, check out www.meetup.com to look for an atheist group in your area. I found one in my area that way.Go too. Good luck finding something. And hang in there.
I'm the only one who believes in nothing in my immediate family,
But you don't really believe in nothing, do you? Do you believe in your friend? Your family? Yourself? Do you believe you are 17? Your atheism denotes your lack of belief in imaginary gods, that's it. It doesn't say anything else about what you do or do not believe in.
Sounds very much like nihilism.
@Dakota: Have you ever hear about the characters The Comedian or Tyler Durden? Have you ever seen the movies The Watchmen or Fight Club?
It would be more accurate to say "faith in nothing".
People can believe in lots of things. But faith is just belief without evidence.