We all read (and enjoyed!) chapter 8 of our textbooks, which deals with language, thinking, and reasoning. One thing I took away from the chapter (among many, of course...) was the concept of extralinguistic information - or 'non-verbal' communication.
It's a little like the language of mathematics, in that all the details of extralinguistic information and signals is universal in relation to every culture on our planet. It's in the way we all express ourselves, use gestures - the way we compose ourselves; our posture. But there's one area in which I find all of these non-verbal cues endlessly fascinating, and I'm sure we all can relate to this in some way...
Whether it's that awkward first date with a cutie you happen to be sweet on, or perhaps even while elbowing through the mob at ladies' night at a bar, how close are any of us paying attention to what is being said by that other person? Sure, the framework of what the conversation is about gets remembered, but most of the attention is centered around how this other person is acting/reacting non-verbally. Are they looking at me? Are their arms crossed? What signals are they trying to send me? It's through these extralinguistic cues that most people (should) know how things are going on a date/encounter. For the most part, and especially if things are going well, these cues aren't singled out, but they are noticed.
Now, I'm not going to link to all the trashy pick-up youtube videos on this subject in order for you to better know how to "get better at dating", all I'll say is pay more attention next time to what's NOT being said, because that's where the most interesting things are happening.
...also pay attention to what they're saying...of course.