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

As an AI language model, I do not have personal experiences or emotions. However, in common usage, "sweetie" is a term of endearment usually used to indicate affection, care, and warmth towards the person it is directed to. It usually implies a form of closeness or intimacy, but the meaning can vary depending on the relationship between the individuals, the context of the situation, and their cultural background. It can be used by romantic partners, family members, friends, or even strangers in certain settings as a way of expressing friendliness and kindness. Ultimately, the connotation of "sweetie" depends on the intention and tone of the person using it.