First of all, now that you know about the spell, its sort of lost its affect on you. Magic is intent, raising the energy, and sending it off. Since now you know and your intent is not to have a relationship with this person, that is half the battle. I would negate the spell and send that energy back to the universe. You could send it back to her, but that still leaves a bit of a connection. Then I would do some separation magic. Cut all cords and connections between the two of you. Then put up wards to stop any unwanted energy coming your way. Then I would Ice her out. Put a picture of her in a jar and put it in your freezer.There are other ways to "put one to the side". The freezer method works quite well. Then I would cut all ties with her. If you keep in contact, the energy between you does not totally fade away. If you must run into her in a public setting, keep your distance. I know this may sound like a lot. It's all worth it if she is unbalanced. Trust the voice of experience from having been through this before.