I'm a divorced guy and I always talk to my dog. I praise him when he does something good and he likes it. When he does something bad, I talk to him in a strict voice. Also I tell him some stories time to time when I return from the office. Recently I caught myself on asking him a simple question and expecting an answer. Twice. This was not very polite, I'm trying to avoid that now. However, when I was talking about my private life and problems my pup looked very bored. So, now I have a question. Can my dog be stressed/depressed because he has to listen all the things I'm telling him?
It does not harm, but your dog has no clue what you're saying. They are, however, very adept at reading body language cues, so it can sometimes seem like they 'understand'. (They do, but they understand that you're sad, not your verbal explanation of why). Likewise, they can pick out your tone, and some words they will recognise and have formed an association with. (My dog knows 'walk' and 'bath' even when used discretely...)
The only thing you should avoid really, is mixing up 'nattering' with 'commands'. You want your dog to know that when you command 'SIT!' that means they need to pay attention and do what they're told. Hopefully though, you are already ensuring you use a proper commanding tone, and so that's not a problem.