I think you write very well. I honestly think that this poem would have been more engaging for me if you had not explained the doctor/vampire relationship in the introduction. If I hadn't known that already, it would have been just that little bit more obscure, that little bit more interesting as I try to work it out. But really good job.

...
STOP BEING SO GOOD AT THIS! (Mutters childishly) You make me jealous. (Sticks out tongue) So NEH.

They were beautiful when he smiled;

a love-bite turned violent.

I like that bit especially- very cool. And I thought the idea of using a Doctor as a metaphor for a vampire was cool.

Peace Out
Cranberry Envelopes

Good work. It flows well. I like it.

This is great. I love it.