Wait what does this mean, who are they, what are their personalities, i know nothing about them. Are they from a story or something?
My burden
This heavy weight, I cannot lift,
This "easiness" doesn't exist,
The bright side disappeared
While you left me here
Though you held me sharpened,
<span>You always left me burdened.</span>
Through is the preposition and window are the object, I believe.
<span>I think that if in your story the main character has a fight with unpleasant nature conditions such as cold environment that you mentioned, it must be an external conflict. Because the person is literary being under the pressure of the outside force and tries to survive. That fascinating struggle is frequeantly used as a plot twist that adds the dramatic action to the story and makes reader thrilled or excited.</span>