When we’re younger and we enter a relationship, it’s like a start-up—two people coming together to build something. We’re more flexible and still figuring out what we want. When we’re older and thinking about long-term relationships and, eventually, marriage, the process is more like a merger: two complete beings coming together. The older we get, the more set in our ways we are, and the more we crave someone who will easily fit into our lives.
