I think this song is simply about a guy who finds out his girlfriend has been cheating on him. He has clearly been hurt like this before, and reaches the conclusion that falling in love only leads to having your heart get broken. When he says "breakin's what your heart is for," he is not necessarily saying that he wishes that the girl gets her heart broken; instead, he is simply saying that he has figured out that love isn't really all that it's cracked up to be. It's a wonderful song to listen to when you feel like someone has broken your heart.
I think this song is simply about a guy who finds out his girlfriend has been cheating on him. He has clearly been hurt like this before, and reaches the conclusion that falling in love only leads to having your heart get broken. When he says "breakin's what your heart is for," he is not necessarily saying that he wishes that the girl gets her heart broken; instead, he is simply saying that he has figured out that love isn't really all that it's cracked up to be. It's a wonderful song to listen to when you feel like someone has broken your heart.