A girl said to me: You look like a poppy.

There is a line in The Sheep-Herding Star, "Somnus is the Latin literary name of the poppy flower. It is beautiful but deadly. Once you are obsessed with it, you will be happy at first, but you will pay a heavy price later. Isn't this a bit... Like the essence of love: beauty also contains dangerous qualities"

Maybe she thinks you are charming but dangerous