What IS a Poem Anyway?

This was supposed to be a poem
And a good one, at that.
But somewhere in my jumbled mind
The idea just fell flat.

The poem was amazing,
Sad, funny and sweet.
Thoughtful and intensified,
Really quite the treat.

But now I just sit here,
This pen in my hand.
Everything I write,
Is really kinda bland.

My brain thought it was funny.
Making me forget.
It does this all the time,
And I almost always fret.

This was supposed to be a poem.
But now it's plain to see.
That what you have just read
Has done nothing but kill trees.