Two battles. 

With each passing day I fight
a battle inside of me and outside.
Why do they have to taunt and chide?
Can't they try understand my plight?

"Oh, its all just in your head!"
"Stay focused, just concentrate."
"Just keep calm and co-operate."
so nonchalantly they said.

'Just' is such a funny little word,
It stood for what is right and fair;
Now, it merely ridicules my fare,
making my troubles silly and unheard.

To them this depression bit is easy,
and I am ill because I let me be.
I can't 'just' choose to be happy!
It's not a toggle switch, you see.

The inner battle is hard, but it's
their apathy that gets me stressed.
I know I wouldn't be so depressed,
if they weren't such painful gits.

Sigh! I hate days such as these.
I wish I had cancer instead, please.

-end-

Background: 
The poem presents the two battles faced by a person suffering from depression. The inner battle, with the illness, is not so hard if the outer battle, with apathetic people were to be resolved. It is to bring to light our behavior towards mental illness - often, in our ignorance and perhaps, haughtiness, we consider mental illness as a pseudo-illness, not comparable with real illnesses like cancer. It is a pity that a patient would rather have a fatal disease like cancer than a workable (if not curable) mental illness. 

The poem's rhyme scheme is enclosed (ABBA).