When a Korean girl calls you "oppa," it typically means "older brother." In Korean culture, the term "oppa" (오빠) is used by females to address or refer to older brothers, older male friends, or even older male acquaintances with whom they share a friendly and comfortable relationship. It is a term of endearment and respect.
However, in some cases, the term "oppa" can take on a romantic connotation. In Korean dramas and popular media, you may come across situations where a female character uses "oppa" to refer to her romantic interest or boyfriend, especially if he is slightly older. This romantic use of the term is more common in a fictional context and might not reflect the usual real-life usage.
It's essential to understand the context and the relationship dynamics between the individuals involved to interpret the meaning accurately. If you are unsure about the intentions behind being called "oppa," it's perfectly fine to ask for clarification in a respectful and open manner to avoid any misunderstandings. Communication is essential in any cultural context, and expressing curiosity and a willingness to learn can help build stronger connections with people from different backgrounds.