I have definitely written a happy song about someone and then we ended up splitting up, but you have to put those kind of things to the back of your mind and tell yourself that it's a good song and it works on the album.
“Fortunes are made, and disappear, over the lifetime of a single generation. Today, a person in essence takes his wealth from society just for the duration of his or her lifetime. The next generation has to create it anew.”