My Wall

If i could get some help with punctuation on this and just a general opinion about options for last two lines.





My Wall



My wall of seclusion is half a century thick,

Built without the aid of mortar or brick.

Its purpose defined by unhappiness and grief,

Only a few have glimpsed past its mortal mystique.

I trusted one and gave entry many years ago,

To this refuge of mine the only life I know.

As our time together abruptly did end,

Exposed to the world this wall I must mend.                  Alternatives

Never feeling secure extra layers were sought,            (sought/persued)

For future entry to my fortress can never be bought.  (can/will)(persued/approved)