Every relationship has an expiration date. You see somebody who looks super across the dance floor. You go over, you dance. It was not what you thought. You accepted them to dance but never ask again.
All relationships have an expiration date.
You develop a relationship that starts out with unlimited potential. You date six months. Turns out to be mutual poison you make each other unhappy, hassle, hassle, so you get out. All relationships have an expiration date. There is a Piano Story about the gal who meets this great concert pianist.