Indeed Nevermore , I for example am Christian so neither Karmic laws nore Wiccan Threefold would apply to me , but I still have great respect for both
So just wanted to say don't generalise when warning about spellcast effect
For the asker : You could pereform some spell to "purify" their feelings as to me appears like but a temporary affatuation :D
Or have the Girl preform "Cut and Clear" spell targeting this person , it will distanciate this person from her life though.
Also let her try Liberation spell , seen in first episode of Charmed as it is a very decent spell dispite on how the show turned out, dress candles with Banishing oil and make poppet using dryed flowers
Just google Liberation spell , let her preform under Waxing Moon , preferably in the hout of Mars