Living for my cat

I am only living to take care of my cat. Since my divorce and then my diagnosis of AUDHD I have lost the ability to make friends. I am 58 with no hope of joy, fellowship or love. When my cats dies I go too. I've spent my whole life alone even in my marriage. I had hope I would find friends but now I am just waiting for my cat to die so I can too. It's just too hard.