Anytime a person wants you to agree with their religious beliefs in order to have a relationship with you--that is, they want you to change who you are--that's a major sign that it's going the wrong way.
I'd tell you to run, but you won't. I know because I didn't run, when I had the chance. I could tell you my own experience, but I don't know that you'll listen. I'll tell you anyway, because it's the best way I know to be of help here. Hello, by the way. I'm sd-7.
I fell in love with a JW, having been a JW all my life. I loved her more, it seemed, than everything else life had to offer. (I doubt you're at that point, but bear with me here.) She was the sort of JW all the other JWs thought very little of, but I saw something more and believed in her capacity for good. I waited, and waited, and finally she was mine. But for a price.
By the time our day finally came, I'd come to see that the JWs were not the true religion they'd claimed to be. When my wife, yeah, I married her, found out, she ratted me out to their elders at the first opportunity. I was shunned by my family to the extent they could do so, and emotionally abused by my wife for some time after that.
Guess what? I came here, and I was warned too, more than three years ago, not to go for this one. I ignored it, and suffered for it. Could be I'd probably do it again if I had it to do over. But daily I struggle with the fact that I chose one of the worst possible situations to invest my time, emotions, and resources. I realize that I could have done better for myself, and that I deserve better.
You can only expect to be jerked around, manipulated, or shunned by this girl. There's no reason to think she will be in a position to choose you, ever. You will at most be a sideshow. You must shut down your feelings and sacrifice them, to save yourself. There is nothing she has to offer you, because she's just not able to give you what will really want in a relationship, whatever that may be.
It will always be conditional. You deserve unconditional love. You must understand that she cannot offer that to you. If it's just sex you're looking for, you'll only screw her up emotionally, really badly. Don't.
I strongly recommend that you end this situation and stay away from her, for your own sake and for hers.