While personal questions can indicate a girl's interest in you, it's essential to look for other signs as well. Pay attention to her body language, such as leaning in towards you, maintaining good eye contact, and finding excuses to touch you subtly. Flirtatious behavior, such as playfully teasing or joking with you, can also be a sign of interest. Furthermore, if she initiates activities to spend more time with you, such as inviting you to social events or suggesting one-on-one hangouts, it's a positive signal. Overall, observe how she interacts with you and assess if she goes out of her way to engage with you on a deeper level.