: Send a message the following day mentioning a specific dish you enjoyed.
: Legally and socially, being bought a meal does not obligate you to provide anything in return, such as romantic or sexual favors. ✍️ How to Say "Thank You"
When someone treats you to a meal, the standard expectation is gratitude, not a transaction.
: Sometimes "we should do dinner sometime" is just a polite filler with no real intent to plan a date.