Blameless?

Say the word and I'll open the door for you,
But if you mistake my address and knock
At the one you see near mine, which is finer
And more suitable to a princess, as you take me for
And if you receive no answer, but stay calm and wait for me
To come out and look upon you
I will never forget the day.

And if I at last hear your voice outside
Calling my name, but for another set of ears to hear
I will blame you forever for your misfortune
And just like this, I'll disappear
Behind my constant wall of ice
Which you cannot see through, for it is made
So as intruders do not see;
And if you at last say your apology,
My eyes will remind you of my own faults.

For when you spoke, you did not speak good
And this I saw too well, so I misunderstood
Everything you showed me; and then I spoke my words
And I spoke them brilliantly and you gave me the rewards
I had been hoping for.
But then again, your mistakes I noticed,
and mine were but too weak in nature
As to be observed by my infatuate mind.
But then again, you were in my eyes a failure
But I had always been a worse foe
To everyone; alas, no one ever saw.