I've known him for many years. I texted the girl to ask if she had a boyfriend. Is there any chance for her to remain silent?

His silent hint is simple, that is, she is very entangled and it is difficult to make a choice. Do you know that?/You know what? Friends will last longer than lovers, because once lovers break up, it is difficult to be friends again, and friends are lifelong. Or she thinks that the person she cherishes more is you, and she doesn't want to lose you. A good choice is silence and good friend Lan Yan, so that she can spend more time with you. Maybe she thinks you are only suitable to be bosom friends, or she thinks that time is too short and feelings are not deep enough, and she wants to see your patience. But no matter what choice she makes, I think she cares about you, otherwise she won't be silent or hesitate, which is enough to prove how important you are to her. In short, cherish her even if she is a good friend! I hope I can help you!