Again

I am not ready to begin again;
I thought that I was finished, over, done,
But here I am, right were I had been then,
Returned to where I started, at square one.
How to begin? How to reprise a scene
I improvised so poorly when I first
Presented it? Of course, I do not mean
To step by step repeat what I rehearsed
The first time, but, since I have now returned
To where I was, it seems the thing to do;
To yearn again where I recall I yearned,
And all those ancient passion to renew.
But must I? And if not, what's going on?
I feel returned to times that should be gone.