I think part of the problem is people being raised to believe that love, in the biochemical sense, is the most important part of a relationship. Hence when they

I think part of the problem is people being raised to believe that love, in the biochemical sense, is the most important part of a relationship. Hence when they start feeling similar feelings for others, their relationship can weaken. But a relationship can be about so much more than just the biochemical side: two people, with similar goals and values, working together to build a better life for themselves and their children, and to help each-other achieve their dreams. In that sense, the time spent building a relationship, time invested in growing trust, understanding and shared experiences, looks like building a business. And abandoning it just for biochemical experience with another looks like somebody with a successful five year old startup abandoning it to start another one because the code was written in Go and they've discovered they really love writing Elixir.