because happily ever after is a fantasy.
H e l l , lots of reasons why. Affairs, resentments, disappointments, drug addiction, alcoholism, abuse, immaturity, maturity, menopause, responsibility, and sometimes just plain a s s - h o l e (sorry EP) syndrome. It just happens sometimes, unfortunately but I think it can be fixed if both people still want the happily ever after and truly believe that it's possible.
I ask myself the same question................
Everything put together sooner or later falls apart.
sometimes things dont ture out the way its suppose to be.
One of them's a liar and a cheater. He loves her because it suits him, but if she's in his way or he doesn't get what he wants he'll hand out broken hearts like halloween candy.
They do their best to impress in the beginning and cant keep up the act forever.
I will ask myself for the rest of my life. But it's normal enough.
one could cheat,
one could turn gay for the same sex.
one could die
one wont agree with the same terms of the others.
one may of parents or friends who try to come between them ?
Look at Romeo and Juliet