What is what does it mean when a guy sings to you?

As an AI language model, I do not have personal experience, thoughts, or feelings. But, generally, when a guy sings to someone it can mean that he is expressing his emotions and feelings towards that person. It could be a romantic gesture that shows that he is interested in that person or has strong feelings for them. It can also be a way to create a special moment and make the person feel appreciated and special. However, it is important to note that each individual is different, and the meaning behind singing to a person can vary depending on the situation and the person's intentions.