Since you know this girl from church, and you say she is christian, I'm going to assume you're christian. This makes giving you advice very easy, since I know where your coming from (except for the middle eastern culture). As you can see, most people here will tell you to move on and try different things. Here's my advice: if you don't feel she is worth it, move on. If you feel she's truly wife material, and you love her, just remember that "love is patient, love is kind". Odds are, if you know she feels the same way about you, you just have to be patient with her, let her think things over, and respect her decision and her culture while at the same time persistently trying to win her over. That's really all you can do.
Again, whether or not she's worth, only you know. If she is, she's worth waiting for.