Brian, she is right. She need sto see a counselor without you. Read the words to the song again Brian. She knows in her heart that she needs to fix her if there is ever going to be an US again for you two. That is a huge step for her and you should be very proud of her for recognizing that.
She "knows" what this is doing, she is trying in her own way to fix it. Be patient brian, be compassionate, and be lovingly detached.
In teh long run, your integrity and loving way that you are helping her through this is going to pay huge dividends for you. When she comes back, y'all are going to be so much better prepared to be in a marriage because of all that you are learning.
Stay strong Brian, I know you are having a hard time seeing the calm waters beyond the crashing waves, you just have to have faith in God to see you through the storm.