This is the wrong place for that brand of myopic nonsense, if ai is good enough to replace girlfriends then every calculation and comparison in your sky falling theory about reproduction rates is turned to junk.

That same automation is already removing the need for people from loads of jobs, especially service industry ones - you don’t need ever more people when we don’t need so many humans to look after elderly people.

The other stuff about society collapsing is just typical tech fear we’ve seen from certain portions of society every single time anything gets invented - most of it is just the classic issue of awareness, of course it seemed people were happier and better connected when you didn’t know anything about their lives, of course more people are open about their mental health struggles now they’re a recognised thing.

Sure some people will be weird about ai and fall in love, people have been marrying horses and obsessing over ladies shoes or whatever else for centuries - society is going to be just fine.