Summary by @tldr:

Men are determined by the "Y" chromosome and women carry mitochandrial DNA which is essentially the earliest form of life that has been captured inside a gene and passed down through the ages.
Well simply put, the meaning of life, in this sense, is for our timeless genes to adapt our finite physical structures to survive and allow the mitochondria to be passed on!
What is that built in evolutionary survival mechanism, that great adaptation, which was created or evolved to keep that man and that woman together to allow them to raise that most helpless of life forms, the human baby?
So when my friend, the one referenced as the catalyst to this essay, who shall remain nameless, but essentially could be any of us, told me about her problems controlling her emotions as it related to her recent break up, she asked me "am I just a loser?"
According to my father, a retired nueroscientist at Columbia University, when human beings are in love, their body's secrete certain chemicals and enzymes that create that euphoric feeling we have all sensed at one time or another.