love spells are just as valid as any other type of spell.
if someone does a spell to get a job and the spell works, then that spell just kept someone else from getting that job that might have had a chace, technically thats wrong right? no, its simply using every advantage available to you to get what you want.
I dont think this persons spell could make her a mindless zombie, forcing her to break up with you, i think it most likely would have happened anyway.
ps. if you dont like it just kill the love spell.