I don't think that necessarily means you're going deaf. Some people have diminished hearing, and they can use hearing aids to help them with that.
I was about to recommend you to go check this with a doctor, but before I did that I clicked your profile to make sure you don't like in USA. (Because potentially insane bills.) Then I realized how messed up that is.
Anyway, you seem to live in the UK, so go see a doctor.
But due to Covid, I'd suggest getting something like this first before you visit the hospital.