I have thought about that a lot and I think it is carelessness. We were both careless, the fragility of a beautiful thing is precious, it needs to be nurtured, we forgot to look after it.
I looked after the children instead, I tried hard to look after everything but I can remember the point where I gave up wanting to look after the precious thing. Without me noticing it became less precious, after a while I thought 'why am I nurturing something which has shriveled to almost nothing, no kind words spoken, no good deeds done'. I felt invisible, unimportant, ignored. I was. I had small children, they became the most important things. I lost myself, had no more left to give, I disappeared.
That is how we became strangers, with nothing in common but our two sweet children.
Somewhere along the way, we gave up, he gave up. How curious.