Shes leaving should I just tell her?

I totally agree. i think you should talk to her as soon as possible. there is a really strong possibility that she is going crazy in her head trying to deny herself because she was raised religious. she also probably has self esteem issues which is why she was shy at first. in her mind (if she is attracted to you) she would be thinking to herself "im so unattractive, why would she like me anyway" maybe that's one of the reasons she has stopped talking to you as much too. she thinks you realized th at she likes you and she thinks you stopped talking to her because you don't want her to like you. if you don't talk to her now, you will be wondering for the rest of your life, "did i let my soul mate slip away?" you need to talk to her. good luck love