What Am I?

I wonder.

When I lost my Rex, it seems that I lost a large part of my identity.

This wouldn't be so bad, if it wasn't for the huge chunk of me that I lost when I lost my job and couldn't get another one.

Since then, life itself seems to be chipping away at the essential "me."

I got a job and couldn't do it.
I write but have no way to share.
Shared writing has become more difficult and less frequent.
When I do write by hand, my fingers and thumb go numb, and I have muscle spasms all the way up my arm.

I am no longer a wife.
I'm still a mother, but my children are grown. (One is something of a big baby, but she's becoming an adult at a greatly decelerated rate.)
I'm a grandmother, but I can rarely see or take care of the babies, due to economics  (I'm usually literally out of gas.)When I do have them, they frazzle me, and it's not so easy to just take them home. I don't really want to, anyway.

I'm a writer, but losing the physical ability to write.

I'm a friend, but I have little to offer or share with my friends, when I can even keep in touch with them.

So, I am wondering, what am I?