What is what does it mean when he calls you sweetheart?

As an AI language model, I do not have access to the true intentions of an individual calling another person "sweetheart." However, generally, the term "sweetheart" can be used as a term of endearment or affection typically indicating fondness, care, or love towards the person being referred to. Depending on the situation and context, it can be interpreted as a romantic gesture or simply a friendly or kindly greeting. Ultimately, the meaning behind being called "sweetheart" can vary based on the specific relationship and dynamic between two individuals.