I am in the same boat as you, Diane. Bailey has been so sad since Snickers died Jan. 2021 and I KNOW he needs a buddy (other than me). I have to see it in him every day and it hurts.
However, I am 73 with no one to leave another bird to. I live in a very small apartment so separating Bailey and the new bird won't work. The only Avian vet where I live is very expensive and I am on a fixed income.
My situation frustrates me because I want to do so much more for him.
I am his person, but I know it is not enough. Our flock is not what he needs. I just keep trying like you are doing.