They need to get him out of there, I assume that's the producers intentions. He's now gone too far, saying he thought she was perfect for him, that's he given it a good go, and annoyed she won't play the game and agree with him to save his image and instead proclaiming he was dishonest, distant and didn't try at all.
What he doesn't know is the rest of the islanders were also saying something was wrong with his behaviour when he was away on the date, so it's not just Alexandra. They all thought it.
He's about to go into full blown gaslighting "look at me trying to be friends and the bigger person, and she's being thoroughly unreasonable" to try to save his public image. Alexandra is fine with it, so so should we be, right? He needs her to say it's fine.
Hopefully he's out tonight and it's over.