Some say that it can be good therapy to have conversations with those that are no longer with us. Working out your problems talking to someone who is not there, keeping the gone close in your mind.
Or are we slightly mad to talk to someone that isn’t there? Talking to ourselves. Even if you wear headphones or hold a phone to your ear that isn’t active to disguise the madness. Are we mad?
If it helps you then I say no. You may work out problems, recall something you needed to remember, or bring some form of inner peace within yourself. After all it’s just talking. We talk all the time. To others, to electronics, to animals. What’s the harm in talking to someone that isn’t there any more?
If it helps.