I understand how you feel. I found out a few weeks ago that the same was happening to me. I ended it immediately. It sucks.
But I admire your tenacity in trying to work past it. It is something I could not do.
Please bear in mind this will take time. You and her both need to understand that you are going to need time to repair what was broken. Her apologizing and you accepting her apology is not a magic cure. It is only a step.
Keep in mind BDP's questions, and be patient with yourself. I wish you my best.