Atheism means that you don't believe in God. There is no gray area. It has nothing to do with spirituality or believing in God but not religion. An atheist strictly believes that there is no God. If you believe in God or you are spiritual, you are not atheist. Stop confusing these kids beautifulrock.
Whether or not God exists, the life of someone who believed in God is 9 times out of 10 better then the life of someone who didn't believe in God. You want to live your whole life believing in God, and be wrong? Or you want to live your whole life not believing in God and be wrong? Its okay to question your faith. But realize that believing in evolution without God takes just as much faith.