What should I do with a coworker who didn’t learn about personal space?

Anonymous
I have this coworker who has been very touchy lately, i mean I’m not sure he does it for that purpose but it’s been bothering me. I think i made it very clear by my body language that i do not approve of this physical connection he initiated, but he remained unchanged. So i gathered my courage (i hate confrontation) and confronted him about the issue, and his response was “chill dude, not everyone here trying to score you”.. i think he was a jerk about it but i also don’t believe that it’s a serious issue that should be reported to HR..

And he still did not respect my boundaries..
What should I do with a coworker who didn’t learn about personal space?
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