After being married three times, all ending for various reasons, I've finally realised life is so much better alone. There're no worries that I owe someone something and I don't constantly need to plaster a smile on my face and act friendly, when I'm really not happy.
I've also found that on your own, nobody can hurt you by lifting your hopes and then dropping them. I'm definitely a lot happier since spending as much time as possible alone. :)