Walls

I hear so many things from this tower where I live,
there is no door to let you in, from here I see your world.
There is no lock for you to find, I keep my walls secure.
I do not wish to be alone, that is I mean with you..
I like to keep you at a length, for you I do not touch.
I like my cave that I have made, it serves me when you push.
How can I show my walls to you, when all you do is search?
You try to find a way around, to be my shining knight,
When all it is I want from you is a "thanks a bunch! G