You don't have the greatest singing voice, but it is original and seems to fit the mood of the song well. You don't need a four octave voice to sound good if you know how to use what you have!
Nice song, although being honest i dont really listen to this kinda thing often. Its very 'for girls' music. Your voice is very suitable for this kind of song, its good. You would do very well in Ireland/UK i think as this singer/songwriter stuff seems popular. Its like if The O.C. came on tv, this song would be featured in it. you know what im saying?
Overall, good job, nothing terrible to say coz your on the right track.