I was a Christian when my wife and I married. My wife is still a Christian and I'm an atheist. We have very honest communication in our marriage. My only advice is to be honest with your GF. Tell her all you are feeling. If she asks any questions, remain open, and give her clear, concise, answers. DO NOT attack her faith or call her belief silly (or any other such derogatory sounding comments - though you may be tempted). If you and she are going to make it for the 'long haul' (however long that is in your mind), then her response will demonstrate her desires. I wish you well, and I hope you find your balance.
