Tip tank,
Rotten luck to have to consider ending your dream career due to ear trouble.
I had to change career in my early thirties, having been made redundant as a civil engineer (my degree was in civil engineering). I moved into IT, starting at the very bottom (I bought a PC and started learning about the hardware and O/S!), and moved onward and upward. I believe I am better off now than had I stayed in civil engineering.
OK - not moving from aviation, but a career change is still a change! Not that I specifically advocate moving to IT, of course.
You might find books like "What Next?" and "What colour is your parachute" useful for considering where your transferrable skills lie, and in what other areas you could re-use them. There are many more books like those - maybe you can find some in your local library to start with.
Good luck!
FBW