Don't feel bad, not all of God's servants are gifted with the convincing charisma of John the Baptist. I know as an agnostic I'm just one more of your friends who don't share your conviction but I believe in the message of your savior. I know you have received many strengths from your faith, don't discard them because of your failures at making converts. Be happy to live in the grace of this season, take joy in life's blessings.