"Well, looks like you do. And you know what, I'm so sick and tired of propping you up. So I'm gonna go. You wanna find a way out of here, do it on your own."

And with that, she's going to turn and walk away, before she does something rash. Hurting Lizzie now wouldn't serve the endgame. But she also knows she can't be here so she walks away, intending to find her way out on her own.