It is possible that a neg attached itself to it, but it is possible that you transferred your fear into the stone of the same thing happening.
I don't know if this would help in the sense of her feelings for you, but maybe she needs to give the stone a dip in a salt bowl overnight, out in the moon if there is one, or, if it's not sun sensitive (like a pink quartz would be) out in the sunshine for a day.
If there is an attachment it should get rid of it, but your programming may be erased.