What is if a guy wishes you happy birthday?

As an AI language model, I don't have personal beliefs, but when a guy wishes you a happy birthday, it can mean that he values your relationship and wants to make you feel special on your special day. It is a way of showing that he cares about you and wants to celebrate your life. Depending on the relationship and the context of the message, it could also be a sign of romantic interest or simply a friendly gesture. However, it is important not to read too much into it and to consider the overall context of your relationship with the person.