There is no scientific basis for believing that love spells work. There are certainly websites and magic stores that sell spells and potions and make claims as to their efficacy, but the likelihood is that they will not work.
The belief that certain charms or combinations of herbs can cause someone to love someone else is as old as history. Love spells appear in ancient Greek, ancient Hebrew and ancient Egyptian texts among others. But there is no evidence that any such spells work, nor any scientific reason to believe they might. It is conceivable that the user of a love spell might gain confidence from the use of the spell, and thereby create a more favorable opinion of himself. This, in turn, might make him more attractive to others, but such confidence is created in the person's mind, and not by any combination of herbs or magic words.