What is when someone calls you sweetheart?

When someone calls you sweetheart, it is usually an endearing term of affection or familiarity. It can signify romantic interest, but it can also be used platonically or as a friendly gesture. The term is typically used between people who have some level of closeness or familiarity, such as friends, family members, or romantic partners. However, it is important to note that the term can also be used in a patronizing or condescending way, particularly if the person using it does not have a close relationship with the person they are addressing.