Have u ever dated someone where they said u were flirting with others but u weren't?

dated a guy who was like this with me, always said i was flriting with other men, to the extent if i was just ordering a drink at the bar i was flirting with the bartender or smiling at a the guy at grocery store for giving my change back - that was apparently flirting... lol

thankfully we broke up, he was very controlling & manipulative... everything i did was wrong. I have my faults too but don't understand how ordering a drink at the bar is flirting!