I have been through fear-of-flying therapy with a psychologist specialized in the matter. He also has a private pilot license and a small airplane (a Piper if I remember correctly), and tries to convince patients to take a spin in the tiny airplane as part of the therapy, after a few sessions.
I fly a few times a year, and got tired of being afraid. Just taking the step to go through therapy helped me in itself, because I felt I was doing something to address an issue that made me feel like an idiot everytime I took a flight.
The therapy helped me a lot!!! I understood the basis of fear, to accept that I was afraid and how to make it not take control over me. I even flew in the darned Piper!
I can't say I am totally off the hook but I have tools to control my fear, and don't lose my sleep before a travel.
Yes, it's expensive. But your health has no price! Do it!