After a few years faking it becomes a skill you develop, and its second nature to me. I don't even know how to be just myself, and that is the honest truth
So how about making 1st Jan 2014 the day you begin learning what it means to live an authentic life?
Listen to how you actually feel about things instead of what you think you ought to feel. Make "should" a prohibited word in your inner conversations.
Well I think all religion is a lie
This is a good start. Now apply the same critical thinking skills to the bigger questions.
Education, careers, new friends, hobbies, sports, fun.... go get it and don't look back.