No judgement or being rude..I'm being serious :/

My bf recently admitted to me that he wishes I would flirt with him. Honestly I'm from a small town, I didn't have to try to flirt to get a guy to notice me. I'm sure I flirted a little naturally. I've been with my bf for over a year. He doesn't think sexual things like sexting are the same as flirting and he wants me to flirt with him. I know this sounds ridiculous but I need help learning how to flirt. What can I do? What can I say? I don't get why I'm struggling so much with this🙁I'm so frustrated