"People don't stay happy forever," Dick agreed. "They don't stay happy forever. Like Barry said. They work at it. They try to make each other happy, and when those ways don't work, they find new ways. And there are some people who stay together because, well, the happy and the not-happy average out close enough to even that it's more of a hassle not to be together. But then there are others who fall in love, who find just the right person and they grow in just the right ways and they both care enough to work to have as good a relationship as they can possibly have."
Dick took Carrie's hand in his and took a deep breath. "If you really, sincerely believe that if you stay with me, then one day you will end up hating me or being miserable, tell me now. Break up with me. I'd rather be a friend with a broken heart than a lover with two."