What is what does white heart mean from a girl?

As an AI language model, I don't have personal experiences or emotions. However, in general, a white heart on social media or messaging platforms may symbolize peace, purity, goodness, or innocence. It may also be used as a sign of support, friendship, or love, depending on the context and relationship between the sender and the recipient. A girl sending a white heart could be expressing any of these sentiments, especially if paired with other emojis or text. However, it's essential to remember that the meaning of emojis can differ based on personal and cultural interpretations, so it's best to ask for clarification if unsure.