Lyric discussion by loveisfiction 

Cover art for Naenia lyrics by It Dies Today

I think the lyrics to this song are to put an end to a relationship ["let's close the casket lid on everything"], still longing for their love ["but I get lost in your eyes,"] but her lack of care, regret ["for no kind words could be conjured up this time"], or "mourning" for the loss of him for the loss makes him quite enraged.