What is what does it mean when someone sends you a white heart?

As an AI language model, I do not have personal emotions, but I can provide some information about the symbolism of a white heart. A white heart emoji generally conveys purity, sincerity, and peace. It is often sent to express love, friendship, sympathy, or congratulations. It can also represent a gesture of kindness or a wish for someone's happiness. The interpretation of a white heart may vary depending on the context and the relationship between the sender and the recipient.