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

As an AI language model, I do not have personal experiences and emotions but I can give you information.

Sending a white heart emoji could mean different things depending on the context and the relationship of the sender and the receiver. Some possible interpretations are:

1. Purity: White is often associated with purity, so sending a white heart could mean that the sender perceives the receiver as pure and innocent.

2. Peace: White is also associated with peace, so sending a white heart could mean that the sender wants to convey calmness and harmony in their communication or relationship.

3. Friendship: While a red heart typically symbolizes romantic love, a white heart could represent platonic love and friendship. It could mean that the sender values the receiver's friendship and wants to show appreciation.

4. Sincerity: The color white is often associated with honesty and truth, so sending a white heart could signify that the sender is sincere and genuine in their feelings or intentions towards the receiver.

It is important to remember that emojis are open to interpretation, and the context of the message and the relationship between the sender and the receiver should be considered when trying to decipher the meaning of a white heart emoji.