This is unbelievable. As I read over your description, I saw the word 'photograph' and assumed that was what it was. I literally had to double take at this when I realised it was a drawing. You should be so proud of this. Outstanding work. I hope your future as an artist brings you much fame and fortune. I aspire to produce art half as good as this.
The composition of the piece is what really fascinates me. The delicate, soft feel of her hair, and the sharp focus in her eyes. This is so good, I can't rate it high enough!