I see it differently. I still feel like Christy and Messa are similar to Akira and Tanya. Messa was only physically attracted to Christy and wanted to fuck her and have fun with her. But now he finds himself in a situation where he's around her all the time, basically living of her. In the instance of Akira and Tanya, Tanya didn't technically live in Tver and Akira never wanted or expected her to stay there as much as she did, so with Tanya's clingyness Akira grew tired of her and shut her out. With Christy and Messa, they both are roommates and are both stuck in the same space. I don't think Messa really wanted to be in this position with Christy which is why he doesn't show as much of an interest in having sex with her like he used to, although I must admit that I don't really watch this apartment like I used to now that it's just the two of them so I don't know how for sure how affectionate he his with her during the day. For the Messa the only thing he can really do at this point is wait for new tenants to come, which as far as I'm concerned needs to be sooner rather than later.
How exactly do you have a party with only two people?