is sorry the word?

Further and further,
we step into darkness,
piercing each other,
by each step made.

How to please you,
i do not know,
how would i know,
as your door is always close.

I am lost, in this darkness,
can't barely see,
i shiver and tremble,
even as i open my mouth.

I am sorry,
for all the things,
i've never done or did,
i was selfish, i admit,
all i did was to save myself,
and i hurt you instead.

in front you stand,
yet i cant say a thing,
making me swallow back what i said,
feeling numd instead.

creating that wall,
up higher and higher,
brick by brick,
i add cement to it.

i'm sorry...please be bak the person i once knew...