The atheist and the religious nut?

Okay, so there is this girl that I like, and I believe she likes me back. We were friends through High School, and well got in arguments every once in awhile, but I still considered her a close friend. Recently after graduating I was able to obtain her number, and I texted her. She talked to me through texts for the rest of the day. We hung out once since than. She is very busy all the time, so she hasn't gotten time to hang out again. The only problem is she is very religious, she is in a Christian Rock Band. Although she has never has mentioned such things around me, I know from her facebook. I have been hiding the secret that I am atheist (not many people know). I love her and can't stop thinking about her. I know what mess I will be getting myself into if I start having a relationship with her, but I just want to be with her. Besides opposites attract right? Please, just give me some opinions on what you think about this. She will always be my friend, but what am I to do?