My sister used to be terrible with flights. There were two things that really helped her though. The first is unfortunately going to be impossible for you these days, and that was a trip up to the cockpit to chat with the pilots and see how everything worked. The second was flying with United (or Delta..can't remember) who have a radio channel for passengers that lets you listen to the ATC transmissions. This seemed to really help in the sense that she could hear the pilots communicating and so knew that everything was going normally.
Actually the seconds probably not much help to you either as I doubt you'll be going with that airline! Maybe try and board early and see if you can chat to the pilots/visit the flight deck before the engines are started. might help you and pretty sure it's still allowed when the aircraft is still on the stand.
Another thing might be to go pay to do some flying in a light aircraft. I promise that after doing some aerobatics, a bus ride in the sky wont seem so scary!
Or just drink yourself to sleep/MTFU/and so on and so forth...
Might help a bit if you know more facts about flying.
