Living a mostly solitary lifestyle and not lonely or depressed? iin?

(This is a little long and I apologise for it but, please read it as I really need some advice.)

I live in near solitude with my mother. We are both introverted and hate having to deal with people. She has social anxieties/phobias. I used to have them but, now I no longer do.

We are happy with having limited dealings with other people and that we both understand each other. I leave the house more than she does. I don't actively seek out to form personal relationships with others.

Her mother believes that we (mostly,I) live a lonely and depressing life. I found her statement to be offensive. How dare she make such a rude assumption? I am not lonely and I am not sad.

I used to be sad about our lifestyle when I was young, but now I couldn't give two left shits about it. I've accepted it and I prefer it this way. It's better than falsely living the life of an extroverted person.

She wants me to go out and make friends (which I already have) and bring them to my house, when I don't want to, etc.

Are her assumptions and expectations normal? How can we convince her that we don't feel like dealing with this and that we're happy with the arrangement?

- Thanks. :)