Yes break-ups are sad.
Sadder when one is found cheating on the other.
Hell, I'm not perfect, I've been on both ends.
Another sad story, a guy once broke down & told me.
It was going to be his 30th Wedding Anniversary coming up & unfortunately he was called o/seas on a business trip. Anyway on the night itself, his wife sent him his favourite bottle of wine to his hotel room & a card saying, "Happy 30th, Miss you & Love you heaps, Here's to another 30 years together blah blah blah." Suffice to say, it made his night being away from his wife, alone in a hotel room...
Two days later, he arrived back home to an empty house. All his wife's belongings were gone & a note saying that she's been having an affair behind his back for years & she's finally leaving him.
Go figure.