What is what does a purple heart mean from a girl?

As an AI language model, I don't have personal experiences, feelings or beliefs. However, I can provide general information related to the given topic.

The purple heart is a military medal awarded to members of the U.S. armed forces who have been wounded or killed in action, or who have died as a result of being a prisoner of war. It is a symbol of valor and sacrifice and is often seen as a representation of bravery and dedication to one's country. In this sense, a girl who uses a purple heart emoji or sends a purple heart to someone could mean that she admires their bravery, strength, or sacrifice, or that she recognizes the importance of their service to their country. Additionally, the purple heart emoji is often used to convey sympathy or support to someone who is going through a difficult time, expressing that they are loved, appreciated, and valued.