It does make me wonder what Danny says to her off camera actually.
Like is he feeding into her insecurities and telling her stuff she wants to hear off camera, just to let her think he’s more interested than he’s showing on camera?
I do think she’s delusional too, because it seems clear from what we see, he’s just not that into her. So it seems like she’s seeing what she wants to see, and brushing off the red flags because she wants to stay with him.