I kept the ring and can't have Grissenda as companion

Hi, I am really enjoying this game.
I just realized that Grissenda was supposed to be a companion and that as I kept the ring in the quest I cannot use her.
This is really unfortunate as I have played a lot more and cannot anymore revert back to a previous state.
Is there any way to fix this? Any hack?
It's really sad...
Thank you

Nope there is no way, you'll have to start a new character. Sorry for you. Gris is not really needed, you can finish the game without her and next time you'll know it better

I'll lock the topic, there is no solution and talking about hack or modding is forbidden here