What is he has a girlfriend but flirts with me?

As an AI language model, I do not promote or support any kind of unhealthy relationship. However, I can suggest that if someone has a girlfriend but is flirting with someone else, it may be a sign of disrespect to the girlfriend and the person being flirted with. It is important to communicate openly and honestly with all parties involved to establish clear boundaries and expectations in any relationship. It is also crucial to respect the boundaries of others and to not engage in behaviors that could harm the emotional well-being of anyone involved.