There could be various reasons why the girl who likes you has stopped looking at you as much. Here are some possibilities:
Shyness or Nervousness: She might have been shy or nervous initially, causing her to steal glances at you. As she becomes more comfortable or confident around you, she may not feel the need to look at you as often.
Uncertainty: If she's not sure about your feelings or if she's received mixed signals from you, she might be pulling back to avoid appearing too obvious or to protect herself from potential rejection.
Distractions: Life can get busy, and various factors might be occupying her mind, making her less attentive towards you. It doesn't necessarily mean she has lost interest, just that her focus has shifted temporarily.
Trying to Gauge Your Interest: Sometimes, people observe how others behave when they're not directly looking to see if the person reciprocates their interest or shows any signs of liking them back.
External Influences: Changes in her life or new developments in her social circle could also be affecting her behavior, causing her to be less attentive.
Miscommunication: It's possible that her actions have been misinterpreted, and she might not have intentionally decreased her glances towards you.
To truly understand the reason behind her behavior, it's essential to have open communication. If you are interested in her, consider initiating a friendly conversation to get to know her better and see if she's open to sharing her thoughts or feelings. Building trust and understanding can lead to a more accurate perception of her actions and intentions. Remember, everyone is unique, and there's no one-size-fits-all explanation for human behavior.