Why would a guy want me to act like I'm his girlfriend in public then block me on Instagram after a one night stand?

Like I'm actually sad. Am I ugly or something and he only realised when he was sober? Is it because I'm strange? Why else would he block me. I don't understand. And how am I supposed to act when I see him in the club again. We're basically from the same city and in the same scene

Why would a guy want me to act like I'm his girlfriend in public then block me on Instagram after a one night stand?
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