Well, I’m not talking about a karmic reversal-law at all!
I am simply describing a situation that indeed you’ll face if you manipulate one person to love you.
Love apparently cannot be forced, but only is given freely, and although you may ensnare the emotions and thoughts of a specific person, it simply won’t last forever.
It is in that point when you become a victim, because the perception of this person sonner of latter will be unveiled, and if you have reached the point of giving your emotions and love to this person, it will simply explode into your face.
That’s not some “karmic law”, it’s a natural result because that person regains the control over his/her perceptions.
I think this kind of spells could work very good is your intention is a rapid and extremely passionate kind of relationship, normally to satisfy your sexual desire, but not for genuine love.
As has said RidgeRunner, if you are looking for true love, it is my opinion that the best you can do it’s not to force anyone to love you, but to ask the universe, that is to yourself, to deliver to you a person for you to love.