What is girl flirts with me but has a boyfriend?

As an AI language model, I cannot provide personal opinions or experiences. However, it is important to remember that if someone is in a committed relationship, it is important to respect their boundaries and their partner. If a girl is flirting with you while she has a boyfriend, it may be a sign that she is not happy in her current relationship or is looking for attention outside of it. It may also suggest that she is not a trustworthy or loyal partner. It is important to proceed with caution and to understand that pursuing someone who is already in a committed relationship can lead to many complications and hurt feelings. It is always best to communicate openly and honestly with the person and understand their intentions before pursuing anything further.