Poison ivy came up like a rose in red and thorn... - WAEC Literature 2018 Question

Poison ivy came up like a rose   
     in red and thorny garb
I look, liked and did dare touch
my pals my avid touch espied
   with green and frosty eyes
I should've only looked, and not leapt,
   For away and over my rising moon she flew
On clipped wings of my dream
    Now a song-filled air pocket of serenades
A love's wretch, my dream is a hornbill
         Flightless and tottering.
   My dream remains a dream still
Now my dream is a locked-up serenade

The theme of the poem is_______