How do you decide if a piece of writing truly is a poem?

My writing I would describe as this... This is what I felt, thought, needed to say. It is important to me It describes something important The structure would not be complete sentences but descriptive thoughts. THAT is how I tend to write. An example is: Daylight Stars We are like shooting stars in the midnight sky of life Some seen only to those watching Others lighting the night turning it to day The smallest of men, Leading the simplest of lives, Often bring the brightest of lights to the darkest of nights. Through hope and perseverance With the companionship of a good friend We may each be the Daylight Star in our own midnight sky