Talk to someone. The best place to start is to talk with your doctor, they can recommend a counselor or a behavioral medicine specialist for you to talk to about techniques to deal with your fears. There are effective programs that can help you. As a last resort, a limited amount of a anti-anxiety medication can be prescribed.
VRT for Phobias. Phobias and anxieties respond well to Virtual Reality Therapy(VRT). VRT is exposure therapy in a safe environment. The research suggests VRT is 90% effective. Seek out a therapist who uses VRT in your area. You can find providers through www.psious.com, www.limbix.com, or www.virtuallybetter.com.
Aviophobia. There are three basic treatments for fear of flying severe enough to be classified as an anxiety disorder, systematic densensitization, cognitive therapy and medications. There is a nice overview at http://www.Guidetopsychology.Com/fearfly.Htm. The severity of your phobia will determine which intervention(s)-your family physician should be able to provide a referral to an appropriate specialist.