Cathy asks Nell if she has made the decision in accepting Edgar’s proposal.
Note the difference in C.’s reasoning: Edgar is a checklist.
Meanwhile, her description of her bond with H. springs from a prescient dream. (Is that foreshadowing? By this time we are fairly sure she is dead in the literary present.)
“He’s more myself than I am. Whatever our souls are made of, his and mine are the same, and Linton’s is as different as a moonbeam from lightning, or frost from fire” (72).
Some powerful similes, some powerful imagery — and so much for checklists.

(How much misery we invite when we do not follow the heart when the heart speaks so clearly.)

And what is she, and Heathcliff? In the next chapter, she nails down Heathcliff’s character succinctly as she describes him to Isabella in an attempt to warn her off. We can infer, then, that this is Cathy’s character as well, given the admission above?

Upon discovering that he is gone, Cathy braves the elements to find him, and remains soaked all night, unmoving. This is foreshadowing.