Spoiler
Everyone has a moment where they suddenly feel so disappointed as they discover the worst thing they could ever hear. You know that moment where your heart just sinks and you fall into a dark place. This is about that moment and how I define the feelings that you feel.
Dismay
My heart sinks in absolute dismay,
my confidence falling from my heart.
The happiness I once felt,
washed out of me and seeping away.
All my efforts gone to waste,
everything seems pointless.
I struggle to fight the tears,
that are pushing out of my eyes.
My thoughts turning into blurs,
shadowing anything that is good.
My hands start trembling,
I had thought for once I was on top.
I fall into a cold, dark place,
if only I cry, if only...

I can feel the emotion coming out from the persona. The little bits of imagery there are good too. I also like the rhymes and the wording.