I don't have a cure for myself so I obviously don't have one for you, but here are some ideas:
1. Look at how many flights work out well https://flightaware.com/live/ there's something like a million people in the air at any given time. It's extremely unlikely that your plane will be the unlucky one. Take a screenshot and keep it on your phone.
2. Think through how horrible a crash would be and then just accept that you might die like this. You're going to die eventually and this is far from the worst way you could go. Your family will probably get well compensated which is a plus.
3. Sit in the stable parts of the plane, which I believe is towards the front and over the wing. The tail flexes which makes for much worse turbulence.
4. Consider drugging yourself. I can't do it but lots of people pop an anti-anxiety pill. Your doctor will probably give you some if you tell them you can't fly. It may completely solve the problem by altering your brain chemistry. Not a good idea if you're at risk of developing an addiction.
5. Fly on the high quality airlines with big planes. They don't want to lose those $500 million planes so they generally staff them with good pilots and do proper maintenance.
6. Don't fly when the weather is bad, just because it might feel scarier.
7. Try to avoid flying at night, just because it might feel scarier.
8. Watch pilot videos on youtube to see how incredibly stable modern airplanes are. These machines are incredibly fault tolerant and capable of recovering from severe problems in many cases. They're not flimsy or weak. They're really badass.