What is when he calls you sweetie?

As an AI language model, I don't have any personal experience, emotions, or feelings. However, in general, when someone calls you sweetie, it is usually a term of endearment or affection. It could be a sign that the person likes or cares about you. However, the context in which it is said and the relationship between the two individuals must be considered to fully understand the meaning behind the term. It is essential to communicate with the person and clarify their intention if unsure.