Umm... too short to be critiqued. It reminds me of a song my brother sang to me once. Haha. Never mind. Are you sure this isn't from a song? And what do you mean by add more? These forums are for critiquing.
~Jamie
"You can't always get what you want, but if you try sometimes you get what you need."
Short, sweet, and to the point, BUT, it would be much better if it was longer. You really start to get a feel for a poem and the words are set into the rhythm at about the second or third--or even fourth, if the poem rhymes--line. Now, if this were written Haiku style, that wouldn't be a problem. But since it's not, I suggest you add more to this poem. Make it...oh, I don't know...ten or so lines longer? I suggest you do work on it, though!