Hi and welcome to the board. JW's are taught to love "conditionally". And this is what you have come up against.
Honestly, I know it hurts, but count yourself lucky. The absolute truth is that if she had faith and trust in you, she would have at least listened to what you had to say. The fact that she didn't should tell you something. She's conditioned by the cult NOT to listen.
It's no reason to lose your faith in love itself. It's out there, and it exists. But you got caught up with a cult, and a person enslaved in that cult. Cut the ties and find something to take your mind off of things until the pain lessens. Your martial arts, perhaps?
Good luck, and once again, Welcome!
RCat