I think the issue is does he want to engage in conversation with you or not?
I know a couple of people who are profoundly deaf for whom hearing aids are not an option. This doesn't preclude them from having relationships and being present and interested in the people around them.
They sign, lipread, write or use apps where you speak and it comes up as text.
It sounds as if he is not that interested in what you have to say, which is more to do with the relationship rather than simply a hearing deficit.
Dealing with this when you have no local support network must be especially hard - please know that physical limitations do not mean you have to be isolated, there are opportunities for building social connections that aren't contingent on being able to power walk or do headstands.
I also lost most of my old friends after becoming disabled at 34, partly because I could no longer do the things they were doing, but mostly I pushed them away, unable to bear watching them living the life that should have been mine.
Eventually after getting treatment that allowed me to sit up and live a somewhat limited but meaningful life, I was able to make new friends through church, volunteering and acting - none of which require standing. There will be opportunities for you too, it just takes being that bit more creative and resourceful.