WTF

I've been thinking recently...mostly because I watched Grey's Anatomy last night...but whatever:
Why are we really the only species who care about each other for our entire lives? If you think about other animals, they don't seem to mind being seperated from their parents. You typically take a puppy away from it's mom when it's like 2months old. They don't seem to remember or be sad. What biological, or psychological, thing makes us need people? And then, when they leave, what makes it so hard for us?
It's not fiar that we love so much only to have it taken away. It's not fair that when people leave or pass away that our brains remember the way they smelled, or laughed, or said our name. Why do we feel that someone else "completes" us? What good does it do the human race to be so connected to someone that when they die we feel as though we've died? How does it make sense that no matter how old we may be we will always need our mom and dad? How does that help humans survive? Why is it that crying is something that, yes other animals to it do but not to the extent we do, is part of life and death? How has evolution made us better than other animals and yet it has come with the price of feelings and emotions? Why do we even have feelings and emotions? They don't serve any purpose to living or surviving really.
Yes, we are pack animals and used to being in herds so yes we seek groups. But, no one ever figured out why when group members leave...we can never truly replace them. I mean, it's mean when you think about it.
Death is a part of life...but without any attachment or emotions it would just be a thing that happens. That's not how it is though. There's a reason there are stages of grief. It's because it's complex and our brains and bodies can't deal with the fact that we've been separated from someone.
The feeling of having your heart broken; of being torn...well, there's just no logical reason that we should be able to have those emotions. They serve no function. They have no reason to being alive. And yet, I feel them everyday. I feel scared every day. I feel joy and love everyday. And I also feel broken and sad every day. And no one can tell me why.
Psychology may not be a physical science. You can't hold it or put it in a test tube and light it on fire to see what color it turns. It's a social science because it's not supposed to be there. The earth, and all it's creatures don't need to analyze conversations and feelings. But we do for some reason. For some reason, we are all crazy. We have the crazy need to be connected to each other, even though our physical well-being gets no benefit from it. Yes, we need to procreate and it's a natural urge to reproduce to keep the human race going. But, why do we stay? Why are my grandparents married for over 50 some years? It's because they love each other. It makes no sense and they're crazy...but it's what everyone wants to be. We are all crazy.
Which leads me to my next question. If this is both our blessing and our curse, did it come from God or the devil? The ability to love and be loved definitely sounds pretty Goddy, but the ability to feel empty, lonely, and broken sounds kinda like the evil one's doings. I don't know myself...I'm just saying...why?