She’s like poetry. / Like prose and love letters and / lyrics, cascading down / the / center / of / a / page. / Rachel, Rachel, Rachel.
-- Narrator - Miles (Chapter 2)

Importance: Miles uses simile to compare Rachel to poetry and lyrics. After this point, Miles uses freeform poetry to talk about his love for Rachel. The reader knows Miles has fallen in love with Tate and has accepted her love when he begins to write about his relationship with Tate using this same free-form poetry.

I shouldn’t have done that,’ he says. His voice is firm. Hard. Like metal. Like a sword. / ‘I didn’t mind,’ I say. My voice isn’t firm. It’s like liquid. It evaporates.
-- Miles and Tate (Chapter 9)

Importance: Miles compares herself to water to describe how little control she has over herself. Her description suggests that water has no strength. Tate's comparison of her weakness to water contrasts late with the water that is strong enough to kill...