Not sure if this is of any help or not but I went through a short period of extreme fear of flying. I overcame it, I believe, because of what I would have to give up if I took the decision never to fly again. If this is an option for you and it would not negatively impact your life then, of course, you simply do not need to fly again. For me that was not an option; it would have seriously negatively impacted my life and so once I had made that decision it became easier, actually fun, to fly again.