I would say you were depressed if all of your poems began to have a morose theme. Or if you complained all the time. Or if you never wanted to write about the castle.
I was also making a comparison of what my life is like, even though I am, 95% of the time, alone. I learned when my son was small that life would be harder for him if I gave up. So I never have. Even in my head. :o])
Ah, now you begin to see the genius behind my genius!
I put all my morose thoughts and feelings into my prose writing, and call it drama. That leaves me the lighter stuff to write poems about.
Complain? Not me. There's got to be a pony!