I don't have any regrets.
What is done is done.
The only regrets I have are the things that were never done.
But:
I wish I had met you years ago.
I wish I had known you when your hair was sun burnt blonde.
I wish I had been on that beach with you watching the rising and setting of the sun.
I wish I had slept with you in sandy sheets.
And woken to the sound of your heart beat.
I wish I had been beside you when you didn't know which way to go.
I wish I had met you years ago.
I wish I'd known then what was to come.
None of which can be undone.