Where there is no talk going on about the most concerning aspects of a relationship...
There is no relationship.
Cohabitation, or coexistence, does not equal relationship.
Been there done that, talking and communicating are everything in a relationship. Whether it's with just friends or romantic interest.
I found that out the hard way. After being married for 30 years, I was complacent and assumed everything was fine and that it would stay that way indefinitely. It didn't, and now I'm divorced, though it took a while to come to that.
I mean, if there ARE concerning things about the relationship and no one is talking about them, there isn’t much of a relationship. Certainly not a healthy one.