Is it normal for two people who are dating, out at a group dinner (3 girls, 6 guys) to not sit beside each other or across from each other?

The girl sat beside a different guy and her bestie, while the guy I thought was dating her was sitting two people down

Is it normal for two people who are dating, out at a group dinner (3 girls, 6 guys) to not sit beside each other or across from each other?
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