Ik this is something that only has to be with you both, I understand you feel worried and not so sure to tell her or no, but i suggest to try your best to sort this out
If you're worried to upset her, just try to say it anyway, she even said that nothing would go so wrong
For example, I also would prefer be upset if someone tells me they don't like something I do rather that continue doing the thing they hate, it HELPS to self-improve, and the upsetness only lasts for short
Edit: dang this shi too long