4. That connection you once had is gone, which usually means that the sex is gone. And that spark of chemistry is necessary in keeping your relationship alive.
5. On a related note, when a partner becomes a roommate, a man loses interest. If you’re ships in the night that have stopped romantic interactions, then you’re basically just splitting the rent and living with a roomie.
6. He feels imprisoned. You guys do everything together, and your independence has waned. This might be fine for the woman, who considers this to be “settling down” but keeping your own friends and social life is also vital to a healthy relationship.