When we are very attached to a person, however that person acts might cause us at times to be happy, while at other times it might make us sad. The possibility that we might experience pain is far greater than that of feeling happiness. After the relationship between two people breaks apart, and to the extent that they then become like strangers to one another, such attachment disappears and they are brought back to a state of peacefulness. On the other hand, there are many other things that we never seem to care about, and it is those very things that would probably bring us more happiness.
~ Luminous Wisdom Book Series 10