Nicanica, your notions of right and wrong in truth have absolutely nothing to do with the question of whether a god exists or not. Once you dispel that Chimera, you'll stand a better chance of finding that the decisions you make not only more frequently conform to your best interests but are accompanied by greater sense of clarity and purpose in place of what formerly could only be called unnecessary anguish and confusion.
He who loves God cannot endeavour that God should love him in return - Baruch Spinoza