1, carefully observe whether she is alone at ordinary times or whether there is always a man around her who sticks together every day. If she stays with the same boy every time, there is a good chance that she will have a boyfriend.

2. As the saying goes, know yourself and know yourself. If you want to know whether a girl is single, you'd better start with her best friend. A girl's best friend knows how she feels. You can get to know her best friend first, and then start with her best friend. Know if she's single.