Going to church does not make you a Christian; nor does saying a prayer, going down an aisle, passing a catechism, telling yourself that you are, or trying to be a decent person. You can only be a Christian if Christ is in you, which can be tested and proven according to the scriptures.
And when he had found him, he brought him unto Antioch. And it came to pass, that a whole year they assembled themselves with the church, and taught much people. And the disciples were called Christians first in Antioch. (Acts 11:26|KJV)
A Christian is a new man and a man with the mind of Christ not by name.