Maybe love is like a pendulum. It swings back and forth, slowly, steadily, and sometimes you don't know where it will come to rest.
I wonder how many marriages are fractured and damaged beyond repair by complacency rather than any single traumatic event. One day you wake up and realize that the distance between you and your spouse has grown to such an enormous width that neither of you are capable of clearing the distance. No matter how much speed you build up, or how far you can jump, it's just there. Gaping and unforgiving.
Life has no guarantees, though. What good is living if all you think about is dying?
And when you're not happy with your own life, and yourself, you can't be happy with anyone else.