When is a poem not a poem?

For the past two or three weeks I have been working on a "poem" on the subject of indecision - on trying to make up one's mind about an important issue and not being able to do so. Such decisions - and they come to us all at times - often cause me sleepless nights, when I lay awake trying to decide on the best course of action. I wish this didn't happen but it does for me as I am totally unable to switch off a worry at bedtime.

Now my problem for today is this: try as I may I cannot make the words I have written into a poem. They read like a paragraph of prose. And I want to know why that is. So - poets amongst you - and there are many jolly good ones amongst the people I blog regularly with - could you tell me why this is prose and not a poem please?

Deciding.

It was a long,
broken night;
sleep did not come easily;
shadows were forgiving,
their edges blurred
by the dappled moonlight
through the leaves.
In the half-light it was easy
to drift aimlessly
from one thought
to another
without coming to
a decision.

Incidentally, I wrote a poem some blogs ago about my recurring dream - a dream I have had all my life, a dream which is faintly disturbing. Since I wrote the poem and put it on my blog I have not had my dream once! Is that coincidence? I rather hope it isn't because putting this
poem/paragraph on about indecision might stop me having sleepless nights.