Excellent work girl. I've come accross few poems with a ryme scheme like this that convey real emotion. Yours does. The rymes didn't seemed forced but flowed into the next line. I really like the way you ended it.

"Staying alive is a challenge to me
Not locked behind bars, not living free"

Again great job.

I agree with Jason, the rhymes and flow were great. You really did evoke emotion into this poem, and it was good. It was short, but really deep. That is indeed life, sad huh?.. Good poem!