I am not surprised. I had a friend like this. In my case, the friend seems to not value relationships AT ALL and thus wants everyone else to never be in a relationship either. Big jealous asshole, basically.
In Twit's case of course the reason she doesn't want her friends having relationships is because no one on the face of the planet wants to date HER, so her friends should not be doing it either. Because she's a big jealous asshole. 😁
She's also a delusional asshole when it comes to this - in the hot tub in Alaska, she said something about them ALL being ALONE and not having kids! Um, Heather has kids! Tal has a boyfriend! Quit trying to make it sound like everyone is in your situation. IIRC Todd even said something like "If I wanted to be with someone, I would"...I don't think he liked being lumped into the "Poor me, I'm alone and childless" group (and he's right, not everyone wants kids or a spouse, but that's different from whining about how you DO want them and don't have them!).
My delusional aunt used to say things like this to make her delusional daughter feel better about being alone. Once she said "I don't think people even get married anymore".
We were at a WEDDING, and everyone at the table, save her daughter, was either married or had BEEN married at some point. Okay then! Don't know what we're doing at this weird party with a guy in a tux and a woman in a white dress, but people don't get married anymore! 🤣 Whatever helps you sleep at night, Aunt Crazy and Whitney!