My Spectre Around Me

What does it exactly say? I understand it but not deeply, I really want to get inside of it, to know what it talks about in every verse and stanza. Briefly, I need its explanation,
Thank you.

My spectre around me night and day
Like a wild beast guards my way.
My emanation far within
Weeps incessantly for my sin.

A fathomless and boundless deep,
There we wander, there we weep;
On the hungry craving wind
My spectre follows thee behind.

He scents thy footsteps in the snow,
Wheresoever thou dost go
Through the wintry hail and rain.
When wilt thou return again?

Dost thou not in pride and scorn
Fill with tempests all my morn,
And with jealousies and fears
Fill my pleasant nights with tears?

Seven of my sweet loves thy knife
Has bereaved of their life.
Their marble tombs I built with tears
And with cold and shuddering fears.

Seven more loves weep night and day
Round the tombs where my loves lay,
And seven more loves attend each night
Around my couch with torches bright.

And seven more loves in my bed
Crown with wine my mournful head,
Pitying and forgiving all
Thy transgressions, great and small.