A Facebook friend posted this recently and I loved it so much that I had to steal it:
"Relationships can be the greatest source of joy. They can also be the greatest source of suffering. This suffering occurs the moment that we begin to expect the other person to provide our joy for us with their specific behaviour. The minute we ask someone to be the source and cause of our own happiness, we lose all power, we live at the mercy of someone else's alignment or misalignment, we expec...t them to live according to our own idea of happiness, instead of their own. And most importantly, we lose connection with the only relationship that truly matters. The relationship between you and ...you. A healthy, loving, consistent relationship with another person is always and only the by product of a healthy, loving and constant connection between you and ...you."