"Anti-social" has multiple definitions. The other poster was using it to mean the opposite of pro-social, i.e. behavior that is bad for society (like roughhous

"Anti-social" has multiple definitions. The other poster was using it to mean the opposite of pro-social, i.e. behavior that is bad for society (like roughhousing in a shared space meant for shopping). This definition is frequently used in the UK and Ireland thanks to Anti-social Behavior Orders. You are using it to mean being averse to socializing.