The dancing boy

Overall, I really liked this. It's a good story and you have some lovely imagery. However, I do have a couple nitpicks.

First off, the first word of each line is capitalized. This is a matter of taste, but I think it looks strange, especially with the one word lines. I'd consider only capitalizing the beginnings of each sentence.

Secondly, this stanza looks clunky and doesn't have the rhythm of the rest of the piece.

It is a dance of life, and all it offers:
Love; so sweat and heartbreaking,
Anger; so frightening and unexpected,
Happiness; that thing we yearn for.

Life grows in his soul,
Hope creeps under his skin,
Happiness slowly sinks in.
He starts to feel at peace.

Hi there!

Here's how you center it:

He climbs of did you mean 'up'? over the green hill
To face the sweeping plain. great imagery here
A smile lingers on his face,
A twinkle flickers in his eyes.

As he steps onto the plain
The fire in his stomach soars.
He stands, raises his hands and
Begins a beautiful dance.

He swirls and glides, facing the sky, I think you should say 'He swirls and glides, gazing at the sky'. I don't know, to me this sounds like he dancing while laying down on the ground. It just doesn't sound right
Heart beating in his chest so bright. can a heart beat bright?
No thought or care, just the
Dance.

It is a dance of life, and all it offers:
Love; so sweat and heartbreaking. I think you should put a comma here as well as after the next line. You're still describing the idea of the dance so it should all go together
Anger; so frightening and unexpected.
Happiness; that thing we yearn for.

He continues that routine for hours,
Reminding him of another day,
When he didn’t have to wipe
The tears away.

Life grows in his soul,
Hope creeps under his skin,
Happiness slowly sinks in.
He starts to feel the at peace.

The sun sets, life forgets.
The world sleeps, many dream.
But he remembers and is
Unable to stop for fear of...
Loss.