Andreas Cappelanus's The Art of Courtly Love (circa 1185) was a popular treatise during the period of the Renaissance and Reformation. It described how a man can and should fall in love, and How he could get out of a love affair he no longer wanted

Chapter III What the Effect of Love is

Now it is the effect of love that a true lover cannot be degraded with any avarice. Love causes a rough and uncouth man to be distinguished for his handsomeness; it can endow a man even of the humblest birth with nobility of character; it blesses the proud with humility; and the man in love becomes accustomed to performing many services gracefully for everyone. O what a wonderful thing is love, which makes a man shine with so many virtues and teaches everyone, no matter who he is, so...