Lyric discussion by voodoodolly 

I think it is about the end of a relationship. He is blaming her for some of his actions. He was unfaithful because she did something to hurt him (maybe cheated also) and/or neglected him: "But you cannot safely say that while I will be away, you will not consider sadly / How you helped me to stray"

"Sleep tight, grim rite, we have two hundred couches where you can..."

Couches are a reference to sleeping on the couch when you've done something wrong in a relationship. You've been rejected and put out of the bed you share because you upset the other person. It's symbolic for the ending of the relationship again. "Grim" is something harsh and dreary, and a "rite" is a ceremony that symbolizes a passage. The breakup feels like a "grim rite", or a harsh passage into a new era without that person.

"And you will not reach me I am resenting a position that's past resentment and now I can't consider, and now there is this distance, so..."

He is past regretting what he or she has done, and he is basically over the whole relationship. The distance between them is too great now.

Oh yeah, and the number "200" in relation to couches means there are have been a ton of offenses in the relationship. You could say "couches" are symbolic for arguments or problems, and the number is meant to show how many there have been, which is why the relationship is over. I think "sleep tight" is either sarcastic, meaning she is responsible for many of the problems & now she gets to "sleep" with that knowledge, or it's a reassurance to self that ending the relationship is best considering all of the problems....

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