I love Bizi and her idea of a dog. I adopted a 3 day old kitten and have loved every minute of his kitten hood. It might be worth a try, and turn out to be something really fantastic for you.
I also have something else you might want to consider. I made a list, a real list of those things that bring some kind of joy into my life. If it is a walk in the woods, or going to goodwill, or just to call someone I care about, I do it. That list of mine keeps me going. Small things can make a difference.
Do you have any hobby you have been interested in? Reading? Often reading can be an adventure. I never expected reading to be so much fun. Started when I was depressed coming home from Mayo clinic.
We will all be here for you. I am not so lonely when I come to this site. There is joy, even if in tiny moments you can have. Just reach for it and try something new. I care about you, ginnie