If it was me, I’d tell her that’s your fear. I really don’t believe much is to be gained by trying to push things under the carpet. If there’s a problem, get it out in the open so you can talk about it and try to resolve it. Perhaps she doesn’t realise how serious you are about it OR perhaps she finds dealing with problems confronting. That’s why I think being gentle about how you approach it is important but not so gently she doesn’t realise how important this is to you.
I hope you can resolve things but if you can’t perhaps you’re not meant to be together? Having very different communication styles can be worked through, but it takes effort and sometimes one or both parties aren’t willing to make the investment.