He saw me, followed me in a crowded place, came behind me and touched the back of my neck in playeful moves. what does it mean?

He: my crush, we' re kinda friends
Ps: he's very handsome and hot. All girls are into him and always talk to him.
He Nevers chases after a girl. I think he's into me, but guys please be specific what do u think is on his mind?
( he is not a player)
He saw me, followed me in a crowded place, came behind me and touched the back of my neck in playeful moves. what does it mean?
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