Security by individuality

Impertinent but important, he isn't sure who he would be without her. Ignorant but enthusiastic, she is involved with him and couldn't be tempted to falter. They were enrapt with each other. Essentially, everything else wasted away. The relationships they once had with their family and friends dissolved. They had no one else to rely on; they thought they didn't need anyone else. Their love was strong enough to keep them together forever. Then they had a fight. Over time it escalated and nothing could be done to mend the threads, so they departed from each other.

When they returned to what semblance of life they left behind they realized just how alone they were when they were together.

From an outsider's perspective, I've come to know relationships intimately. I've seen them develop and grow among my friends and noticed that the ones which seem most stable and secure are inevitably the ones that come to bitter ends and leave not only the couple damaged, but everyone around them as well. Maintaining all your other relationships while dating someone is more important than most people know. We're fickle. We change with time. So we can't expect a singular person to be our only means of support.