I periodically get clients who have paid someone to do a love spell. In reality this doesn't work, you still have to contend with your own problems. Power comes from within. The more we hand it over to someone else, the weaker we feel. Love spells may leave you weaker because you've diluted your own power.
Intent is very important in any ritual.
If the intent is to manipulate, we interfere with an intricate framework, the natural flow of life. Every ritual should be aligned with God's will or Divine Intelligence. We don't always know what is best for us. We need to consult and invite the intelligence and wisdom of something beyond ourselves. When someone pays for a love spell, that person is missing the opportunity to work with God.