Keep in mind that human behavior is complex, and there could be various reasons for this change in her behavior. Here are some possibilities:
Shyness or Nervousness: Initially, she might have been looking at you because she was interested but felt shy or nervous. As time went on, she might have become more self-conscious and tried to avoid direct eye contact.
Loss of Interest: People's feelings can change over time. It's possible that her initial interest has faded, and that's why she isn't looking at you as much anymore.
Uncertainty or Mixed Signals: She might have been trying to send signals of interest by looking at you, but if she didn't receive any clear response or signals from you in return, she might have become unsure about how you feel, leading to a reduction in eye contact.
Social Pressure or Rumors: Sometimes, social dynamics can influence someone's behavior. If there have been rumors or pressure from friends or peers, she might have become hesitant about showing her interest.
Personal Issues: Changes in behavior might have nothing to do with you. She could be dealing with personal problems or stressors that are affecting her behavior and not related to her feelings towards you.
Shift in Focus: People's attention and interests can change over time. Perhaps she has been preoccupied with other aspects of her life, causing her to be less attentive towards you.
Fear of Rejection: If she felt there was no reciprocation or indication of your interest, she might have decided to protect herself from potential rejection by not looking at you as much.
Cultural or Personality Differences: Different cultures and personalities express interest or attraction in various ways. It's possible that her behavior is influenced by these factors.
Ultimately, the best way to know why her behavior has changed is to communicate openly and honestly with her. If you're interested in her, consider having a friendly and respectful conversation to understand her perspective and share your own feelings. This can lead to more clarity and better communication between the two of you.