I know how you feel. When I became disabled my friends left me. My closest ones died. I admit I've pushed some away.
Being all alone makes me feel like nobody cares. So I isolate. Which is not healthy.
I decided to join a chat room. It has helped some. It's not the same as having someone here but, I don't feel so alone now.

I don't know if this will help you, but it can't hurt to try.