It sounds like the you still have an emotional connection to her even though you've moved on. Ten years is a long time to be with someone and not have an intense bond, even if you were no longer in love. Be gentle with yourself and take your time while you grieve the loss of a relationship that meant a lot to you in spite of the betrayal. You had hopes and dreams for a marriage with her that ended after a long investment, disrupted by broken trust. It had to have been emotionally devastating. In time, you will heal as you let go of the connection and move forward.