Harmonies and dissonance

The great dualities of human existence govern our lives every day. We're born alone, and effectively we die alone. Is there a god, is
there not a god. We love, we hate, we're cold, we're hot, and the list goes on and on. Our nature is a dual nature. Within each of us, there are polar extremes to our existence. We are body, and spirit. We are mind, and heart. It's enescapable. The greatest trial of our lives is to find a balance between these two extremes of our conscious states. Finding this middle ground, and living within it, is something which mankind has sought from the first moments of sentience.
So, why is it when someone says that they've lost the love of their life can they not right themselves quickly? Would they be so distraught if they had lost the hate of their lives? Would they feel so empty if they could never experience true cold in their lives? Why is it that love has such the effect upon human beings that it is the penultimate governance of our consciousness? Is it that love is the most imporant part of us? Is our nature made for love, is it built from love, so much so that we are drawn to seek it in other beings?
I was recently in a chatroom where there was someone there who had lost the love of their life. You could hear the pain and sorrow in their voice, in the words that they spoke of this person. Is this how we combat those primordial feelings of being born alone, that we seek out the perfect compliment to our lives in the embodiment of another human being to fight off the fears of ever having to face that terror and loneliness again?
In our world, we are closer together than we have ever been as a race. We are connected in ways that we have never been. It's likely that at some point in the future we will be connected ever closer to one another as a race, will this need for companionship continue to rule our lives in that time when we can feel and touch from across the wide sea? My guess is yes, it's deep in our nature to seek out the comfort of another warm body on cold nights.