It might be helpful to try and fight the feeling that you must "choose." There may actually be some things that you admire about Christianity. Some Wiccans believe that there are grains of truth in many different religions and pick and choose those practices and beliefs that they find most helpful. Others who have come from Christian backgrounds retain some of their Christian practices and feel fine about the mixture of influences. Spirituality is as personal as a fingerprint. It's okay to ask yourself questions about the kind of practices that satisfy you most and it's okay to mix and match.

No matter what age you are, exploring, questioning and getting to know yourself better is always a good idea. But if you feel that attending a Christian school is really just too hard for you, explain the situation to your parents and ask them to explore sending you to a more neutral school environment. I'm sure it's not easy being a pagan adult either--they're likely to understand.