What is will he notice i unfriended him?

As an AI language model, I cannot predict other people's behavior or personal reactions. However, if you unfriend someone on social media, it is possible that they may notice the change in your online relationship status and react in some way. Some people may not even notice or care, while others may be hurt or curious about the reason why you unfriended them. Ultimately, it depends on the person and their level of attachment to your online connection.