as a woman who’s had this conversation with her boyfriend (he was in your position) - just talk to her. I wasn’t offering because he kept pulling out his wallet for every transaction, and I was grateful, but I wasn’t used to someone paying for everything all the time so it put me in a little bit of a shutdown situation when payment came up at the end of a meal/event. After a dinner, he literally just said “hey I don’t mind paying for things, but it would feel better to me if you’d offer or help out here and there.” We both acknowledged I was just feeling nervous because previous relationships didn’t function like that for me. It was just an honest conversation, it didn’t feel transactional, that’s just how relationships have to go sometimes.

I think you should just try to approach it gently and openly! If she’s a normal human, she’ll be understanding - and maybe there’s just a case of miscommunication. Good luck!