Answer.

On one side she's soft.
On the other side she's hard.
Her personality changes more than a bad liars story.
By the way they call me red but my christened name is rory.
One side of her is bright.
And the other side is dark.
I never know what to expect.
Is she's going to be happy to see me or i is she going to neglect.
One side of her sane.
The other side mad.
With her i am always wary.
By the way her name is mary.
One side of me says yes.
And the other side says no.
The question is, with her shall I stay.
Or shall i go.
Well what do you think.
Yes you, you're reading this aren't you.
Shall i stay or shall i go.
You, yes you, do let me know.