To heal anxiety you must cultivate a mindfulness-based relationship with that anxiety. This means that you embrace the emotion with the combination of conscious awareness and compassion, which collectively is the essence of mindfulness. Change begins when you can become a genuine friend to you anxiety instead of our habit of avoiding or reacting with aversion to our anxiety and negative thoughts. This shift from aversion to mindfulness is subtle and needs guidance, but in my experience it is the most effective thing you can do to produce real and lasting change. You might try mindfulness therapy with someone experienced with this approach.