This might sound a bit strange, but if you notice that someone starts to mimic your actions, it’s probably because they like you. When you’re at a party or another social setting, and that special someone tilts their head when you do, takes a sip of their drink when you take a sip of yours, maybe touches their hair when you do too, it’s because they like you. They’re not even doing it consciously really, but it’s just really an organic way for someone to react to someone they like.