The love of your life leaving you is not a good thing and the three other reasons given make it even worse because it implies that the person was never really in love with you to begin with.
Consider the staetement "The love of my life left me for a better man.". Based on this statement, is "Its absolutely wonderful to have the love of your life leaving you for someone richer, better looking, and more successful than you?." a true statement? Yes/no/unknown