People look for these spells to create happiness for them, some of them get lost on the way and seek to get love whether they try to take someone's will away (whether that be true or not). Now in all honesty we all probably have thought about takeing a easier way to find something we want.
In all actuallity that is apart of being human, we can't get everything we want, the universe will not allow that, especially not with magick.
What people practically lack when wanting love, is the ability to keep looking and have faith that they will find it. Love will represent itself when the time is right. There is no need for a spell, especially a spell that can bring you over the edge.