Sorry for the delayed response--I have been on vacation. But I wanted to welcome you to the hearing loss community.
Typically a hole in your eardrum would heal on its own. After four years my guess is that it would not. Have you posted on the ENT forum?
There is a surgery that could repair that. You do not want that area open to the world, and you would hear better with your tympanic membrane (eardrum) intact. Google tympanoplasty to learn about it.
I would visit an ENT if you have not already. Let us know how it goes.