What does it mean if a guy calls you a meanie even though you are not mean to him?

If a guy calls you a "meanie" despite your kind behavior, it could be a playful or teasing remark rather than a serious accusation. He might be using humor to express his feelings or to create a lighthearted dynamic between you. Alternatively, he could be feeling vulnerable or playful, using the term to elicit a reaction or to flirt. It's best to consider the context and tone of the conversation to understand his intent better.