Breaking Up...Is It All Nature.

Lately, it seems like everyone is breaking up. Superman and Lous Lane. (I don't know how to spell her first name, to be honest. Jennifer Lopez and Marco Anthony Brad and Jen. Barbie and Ken (Okay they broke up a while ago, but it's still the same thing.)
Why does everyone break up? Is it all nature? They make millions of songs about it, and how the next one will be around the corner, better than the first. But, whatever happened to the happily ever after, love story aspect on all of this? Whatever happened to the dream of being with someone forever, and they being with you forever? Have we lost this common goal? Sure, if a relationship doesn't work out, because you are not happy, then it's one thing. If they are hurting you, abusing you, giving you mental or physical bruises, then yes, you should leave, because it's unhealthy not to. (Look at Sammi and Ronnie on the hit show Jersey Shore. Fighting? Not Good) But making a mistake to cost you that relationship should matter more, should be a greater cost because that person matters more.
Of course, if you truely love someone, than you should do what's best for them. You should try to not lose sight of what's best for your health, and what's best for their health, physically and mentally.
But, using someone isn't good either. Being in a relationship for all of the wrong reasons, just because you are afraid to leave, isn't good either.
Breaking up with someone is something that is far too common I think. I think relationships are required to have work involved, and someone whose afraid to put in the work, and leaves, is also very stupid, because that person should matter more than your selfish needs. Making it work, or trying to make it work should matter more than pride or laziness.
Breaking up may just be in the human code. It may just be in our blood as humans not to be happy with whatever comes our way, and always look for that newer, shinier, better model. We could never be happy with ourselves, and what we have, and then we have to get more.
It's just the way of life.