Yes, I flee from you

I flee from you under dark of night, 
Hoping that I do not catch your roaming sight. 
For if you wake while I am running from your charms, 
You might try to catch me back up into your arms. 
You do not understand my cumpulsions deep. 
Nor why I take to newfangleness steep. 
But surley as I stand in darkness now, 
I shall tell the truth to you, this do I vow. 

If faithful to you you desire me to be, 
Faithfulness is required of you back unto me. 
And take not another maiden to your heart, 
or allow any other to fill my part. 

So then when my shoulders are once again bare 
And my arms are around yours so broad and fare, 
You shall not worry about me in the morn, 
I will still be there lying beside your form. 

And when this is fulfilled I will be 
Happier than ever, 
And I shall no longer flee. 

I'm sorry to admit that I am uncertain of author of 

the above poem of beauty, please enlighten me?