What it means if my crush put his arm around my waist while he was sittinng and me standing?

He was sitting on a chair and I was standing on his left side talking to him then he randomly put his arm around my waist and pulled me slightly without saying anything. I got nervous so I just rested my hands on his shoulders and looked away. Is this a hint he likes me back what does this even mean why did he do that
What it means if my crush put his arm around my waist while he was sittinng and me standing?
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