You don’t seem to be as fragile as your name suggests,
Though maybe I should think about you differently
Your age is like infinity,
For all you know is dead.
Your whole history is death, my dear - Reference to his magic.
How does that make you feel?
I’m sure you don’t feel much at all. - He's indifferent, apathetic, nonchalant, etc.
But when you finally look at me with that icy gaze - Reference to eye color (blue). Could also be reference to how he's often described - cold, chilling.
I’ll try my best not to fill you with hate.