All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
You should repel these whispers and stop giving in to them.
This feeling does not make you a Kaafir (disbeliever); a person is not held accountable for liking a non-Muslim for his stature (looks, shape), or his qualities. However, you have to hate her for her disbelief, and there no doubt that you definitely hate her for this.
Therefore, repel these whispers and do not pay attention to them.
You should consult a psychiatrist to treat your condition.
Allah knows best.