Thank you @shakespeare47! The good news is that the gaslighting is SO far from the truth that it's not really phasing me. I've had to set this person's communications to be immediately deleted because it's just nonsense.

It really illuminated for me that saying about cognitive distortion where feelings are facts. This person, their feelings are facts, meaning however they feel about something or someone in that moment means it must be so. And in the next moment if they feel a different way, then that is now a fact and the truth, and they'll deny that they ever felt/thought differently.

The biggest problem is that I believed this person had the potential to really do a lot and go far, and so I stretched myself to support them, even when it felt at my detriment or dangerous to me. Well, I think the lesson is finally learned. That first image said it all: Don't fall in love with potential, believe the red flags, and don't lower my standards.