What is what does it mean when a guy calls you precious?

When a guy calls you "precious," it usually means that he considers you to be valuable and important to him. The term "precious" is often associated with things that are rare and special, so when someone uses it to describe you, it means that they see you as a unique and cherished individual. It could be a term of endearment from a close friend or a romantic partner. However, it is important to note that different individuals may use this term differently, so it is best to take it in context with other aspects of your relationship with the person calling you "precious."