Worth noting that it's possible to have an AI sex, or possibly even romance, toy that one wouldn't consider a girlfriend or boyfriend. I suspect that far more people will have an AI that they do sexual things with, than would call that AI a "girlfriend", especially given shame etc.

Not sure what data source/ definition will be used to determine the count of girlfriends, but the rising number of people living alone seems like important context

https://www.pewresearch.org/social-trends/2021/10/05/rising-share-of-u-s-adults-are-living-without-a-spouse-or-partner/

@JonahWeissman ok, but anecdotally, most people I know who would count as "unpartnered" in the above graph have one or more non-ai partners. If we're going by the metric of "not married or cohabiting with a romantic partner", I'd be inclined to bet on Yes here.