Join the club. It's kinda creepy isn't it?
I'm older than you but I know what you're talking about. When I was very young, it seemed like I could zone in on what ppl were thinking and feeling - and no one could ever lie to me without getting caught. Sometimes I bluffed them out, but most of the time I was right the first time.
You've probably noticed that you're also aware of your surroundings more than other ppl. Every nuance gives you clues to what ppl are up to and 'what might happen next". You're very intuitive. In time it will be something you never want to lose.
Good luck