Sweetest Poison

It’s nice to see you,
I never want to see your face again.

You have an impression on me deeper then any cut,
Everlasting like these scars.

Memories run threw my head,
As a blade dances on my flesh.

No razor compares the pain you put me threw,
You'll certainly be my death.

Because of you tears stream down my face,
as the blood runs down my arm.

Your personality is infectious like a disease.
You’re as charming as cancer.

My last word to you were venom.
My poison's the sweetest you've ever tasted.

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Please tell me what you think about it. I wrote it for english class. We had to write a poem about heartship. The last two phrases or what you wish to call them, I don't think I'm gettng those to flow smoothly. I want to incorperat the personality being as charming as cancer, and the other persons words being the sweetest poison though. Any ideas would be AWESOME. <3