How can you tell if a guy likes u at a club?

Basicly Saturday I was outside the club/bar where my friend works & 1 of his friends who I don't know was just randomly stroking my hand... I didn't pull away becuase I thought he was good looking.. I then decided to go inside & we saw him in there so he was dancing beside me for a while, then walked off... From then I would cacth he just wacthing me dance but not all the time.

He was dancing with other girls but I think he already knew them. I asked my friend who worked at the club to see if he was single & he sed h would find out for me

Not sure what to make of it... My friend who I went there with said he was trying to play a bit of a game by sending mixed messages which I kinda think is true but as I'm not to good at Reading signals I thought I'd as you lot lol

if he liked me that much wouldn't he have asked me name, or anything but he did know we have a mutrual friend... Don't know I'm confused.