[Jonathan should have known that Nancy would not have faulted him if he had just been honest with her in the first place. She knows how much his family means to him and it would be extremely selfish of her to ask that he ever place her first or push his family aside to accommodate her wishes. The Byers had been through so many horrible, unforgettable things and she doesn't blame Jonathan for having that fear to leave them behind without his protection. Yes, his choice would have hurt but Nancy would have respected it. 

Instead he chose to string her along and build these great plans with her that he knew would never come to be. Who does that to someone you're supposed to care about? Maybe this was her form of karma for how she had treated Steve and what Steve had done to him. She was now experiencing that level of pain but yet she still felt numb.

The more Jonathan seems to speak the worse the conversation turns. It's one thing to lie to her for as long as he chose but now it's speaking as though she never actually mattered. That he's ready for her to just walk right out of his life if he doesn't push her first. That's what really hurts and sparks an anger deep within the pit of Nancy's stomach. ]

Stop. 

[She holds up a hand to silence him before this conversation goes any further, her voice a bit tight with her words.]

I would have expected this from literally anyone else, Jonathan. Anyone else!

[She has to compose herself from yelling because she feels it's not worth it and she still feels oddly calm about all of this. That alone could be concerning but their relationship had always been a ticking time bomb, right?]

We should have ended things months ago.

[could they have saved themselves even then?]