Yet again

Here i am late at night
Wondering what will become
I married the perfect woman
I have a perfect job

Years ago I was in a plight
I sat pondering the future
I thought about a mate
I thought about jobs

Now here I sit yet again
Remembering the past
Knowing what happened was best
But still regretting past choices

If I had of, or could of
What would of been,
What could of been,
What should of been?

My heart knows now, loves now
My brain wanders to the past
What can I do to stop this
How can I control thought?