This has happened to me too, where a person I thought was a friend says let’s hang out, I make a suggestion, and then she never responds. Maybe it’s the platonic form of ghosting. Maybe they just want to feel like they’re friendly and their company is desirable. I dunno. I’d be interested to hear from people on this subject who have done this.
I agree with you. If this is social BS that someone has no intention of following up on, don’t waste my time.