Teenagers are great evangalists... do not discourage us...
I know, I was one, too.
When I was older I realized that I was into all that not because god was talking to me/walking in fellowship/whatever but because it all gave me a great sense of belonging to something, and we didn't have gangs where I lived.
Now that I'm older, with a better sense of my own identity, I don't really need that. The older I got the less it seemed god had to do with anything until, ultimately, god seemed ether powerless or non-existent. Hence, atheism.
You've got to choose your own path, so I'm not saying you should be just like me - but recognize that there may be very predictable reasons you believe what you believe.