Here's the lesson: Don't talk so much.
Via text, to a cute guy I'd met, hung out with once over the course of an evening. The next day, I couldn't tell if he was just being cordial, so I tried to hint I wanted to see him again.
Me: Yeah, sometimes I am too friendly and just talk at people. I can't tell if they're interested or just being nice. So. That.
Him: No worries, can't help being yourself.
So (literally) Undateable.