There is nothing wrong of casting a love spell as long as you wont cause any harm to other people. It is a wrong notion if you think that you are controlling someones emotion when casting a spell. What you do in here is opening up the mind of a person and let him remember the reasons why he had fallen for you. This will somehow revive the emotion which only means that you need to give the relationship a second chance.
In magic love spells, youre making the love go stronger in order for you to keep holding on with each other despite of the trials that you are going through. You are enhancing the positive energy so that it would be easier for both sides to forgive, understand, and give love.