"I am 100% committed to our marriage and 100% committed to her."
That’s great. And real clarity for the two of you to get through this.
It seems she doesn’t understand that moving on isn’t behaving like what happened to you didn’t. And that her words and promises aren’t enough anymore. That was true once but that mold was broken when she had the affair and now there are new standards and conditions.
Everything has changed and shifted in your marriage, and for you to go along with the old protocol is dangerous for you. You know that and she does too. No matter what she says, she knows that you can’t accept that kind of risk in your life again. Not if you both want a good marriage.
It’s interesting how hard a time some WS have admitting what they did. They must though, if they want to be trusted again. Trust is foundational in a marriage. Their recommitting means they have to rebuild the trust they broke and accept their blame in it. Then you can both move forward from this.
Part of getting there is her being there for you when you doubt her, doubt yourself, doubt your marriage and all your decisions. She needs to stay steady as you love her one day and are angry the next.
She will need to understand she has to reassure you over and over, until you feel safe again, until she proves she has earned your trust again.
She needs to understand that to "fix" your marriage, she is no longer the center of things. You are.
It can be done, if both partners do their part.
If you can’t get her to understand where she has put you through your conversations, then you can try getting professional help. She sounds like she really has the walls up so it may take an outsiders perspective to get her to see. I wish you the best. We got through it. She has to put in 100% too.