i think you did a wonderful job with this. you gave a very vivid picture of how hurt you are, which is impressive, considering how young you are. i loved it, but don't be too distraught by this, there will be so many more people to love! my advice is to live and let this girl go... - spelling error: "persue" should be "pursue"
A piece of you will always love her, trust me. No matter how hard they break you, and no matter how healed you become, a part of you will always remember her and love her for what she did for you before she left. So do not die, but love her instead. Persuing her will make you feel worse, because from the way you worded your piece, she doesn't ever want to come back, but you can always love her. I retain a piece of my heart for each of those who shared their lives with me, if only for a little while.
I loved the style of the piece. It is very heartfelt, and powerful. But please do not consider dying because of it...you are young. There will be another, I promise you.