I Feel Useless lmao

I work in a fast food place, which is not bad at all, it's so much better than my other job and I love it there. But I have arthritis, so it's hard for me to do things. I can't crouch, I can't bend over very far, my fingers are slow and it hurts to walk. Everyone there is really nice and they think I'm cool and smart and good with customers, but I know that they know I can't do jack shit. My boss is really nice and I love him, and he gave me some special tools to use to speed up things that require my hands, but I feel useless. They're all accepting, but I just wish I could be like them and able to do it right.