I'm sorry this happened to you. The brutal truth from me and my own inner, is she is not in love with you as you are her. I could be very well wrong, but I am a true Pisces, and am surrounded with Pisces women, we are die hard romantics, and never let go easily. She must have found someone else whom she feels more intensely for.
Pisces women basically live their lives seeking out that one true love, and once we find it, we would never ever let it go. We are also one of the more sympathetic signs, and for her to know you have flown there and still refuse to see you is completely lacking in sensitivity, and a bit cold. She doesn't want to fix anything, or work on anything, she is definitely done.