The pop music industry is sustained by matters of the heart. Blooming love, failed love, unrequited love — there's a song for every shade of romantic feeling. Naturally there are also songs that explore the many facets of cheating. There are guilt-ridden, exhilarated songs sung by the cheaters themselves. There are anthems from the betrayed, hell-bent on revenge. Other tracks are dripping with empathy.
Songs about falling in love and experiencing intense betrayal deal in many of the same emotions, caused by a specific cocktail of endorphins and adrenaline. But since each incidence of cheating is unique, so too are the emotions that propel each song.
To paraphrase Anna Karenina: Happy relationships are all alike; every unhappy relationship is happy in its own way. Enjoy these songs, each tortured in its own way.