I don't always agree with BG, but I'm gonna chime in with a HELL YES this time.
Sounds to me like Darling has his own issues, even without Chatty in the picture. He was in denial about the issues with her, now he's in denial about the issues regarding this living situation. And he makes unilateral decisions without consulting ANYONE?? What the crap?!
You have the right to your own space if that's what you want. He should not be guilt tripping you about that. If he wants to wake up to you every morning, you two can discuss him staying at YOUR place (once you have one).
Pan Female, Hinge in a V between my mono (straight) husband, Monochrome and my poly (pan) partner, ThatGuyInBlack