I speak to my horse that was put down in 2011, seems stupid but I would have conversations with him when he was alive, so it helped somewhat when I would speak to him in my head.
I speak to Karl, I find it soothing in a way speaking to him, even though I don't believe in an afterlife, it just makes me feel like he's still a part of me, helping me and answering my questions, or at least helping me to come to my own conclusions about problems.
It's worse in some ways though because there are things I want to share with him that I know he would have been interested in, but it gives me some peace of mind that it doesn't worry me so much that he's never going to actually reply, just as long as I keep speaking to him.
I don't speak out loud to either of them.. My mother would probably have me committed.. And I feel like these are private conversations anyways so I wouldn't want anyone alive to know what I was saying. And even though I sometimes end up crying after speaking to them both, I don't wish to stop anytime soon.