None of the flairs on this subreddit are really appropriate for asking about the actual psychology of BPD, which makes me worried that this isn't the place to ask haha.

I joined BPD and NPD subreddit a few months back in an effort to work on myself via like-minded people, but every other post on the BPD subreddit is talking about Favourite People as though it's a core trait of having BPD. I've experienced something similar in a few different people, and I used to very strongly believe in the idea of FPs.

But when you actually try to look it up, the only thing on Google is pseudoscience articles from Buzzfeed-esque sources and YouTube videos made by people who are distinctly not professionals. Is there any scientific study or any reputable backing in the world of clinical psychology that considers Favourite Person to be a diagnosable trait of BPD, or did the term just spring up from the internet cult that formed around the disorder in the mid-2010s?

If there are no professionals to answer this post (or anyone with links to actual psychological studies), I would at least appreciate hearing from someone who had been diagnosed with BPD before the internet craze circa 2014.