Why did this guy tell me I look uncomfortable at the club?

I was there yesterday, in the middle of the circle just listening to the music. I'm not a good dancer though haha so I always just bob? my head I guess, it's metal anyway so. There's lots of people who do that. Then suddenly a guy came up to me and pulled me aside and told me I look uncomfortable when I wasn't? I was drunk as fuck, I have social anxiety though and a resting sad face so that could be it I guess.

But I'm scared that people assume I don't want to be there. I always love it and literally stay until the lights go on lol? Hearing that I basically look unhappy made me kinda sad

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He wasn't hitting on me by the way
Why did this guy tell me I look uncomfortable at the club?
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