Very nice... for a moment there I was afraid it was going to be teen angst, which can be very pretty mind you, but in the end teen angst is just teen angst.
This has a meaning.
First of all, I love the line "Fear of a dear, so helpless" very nice.
Remember though, even though it's poetry doesn't mean you can neglect grammar. Sentences in poetry are still sentences, and they require periods, and question require question marks.
I have to disagree with Mana's statement about changing the "A sorrow..." line. Although she is right about using only as many words as you need, in this case I think abridging the line actually changes the meaning. But, your two lines, "A sorrow..." and then " A sad sorrow..." are a tad awkward. They interrupt the flow of your poem.
Just a thought