Why did Leo prefer weekends to school days once he began dating star girl?

Leo preferred weekends to school days after he began dating Stargirl because weekends offered them more freedom to spend time together without the pressures and distractions of their school environment. During the weekdays, the school atmosphere often felt judgmental, especially regarding Stargirl's unique personality, which made Leo anxious. Weekends allowed them to enjoy their relationship in a more relaxed and authentic setting, away from peers' scrutiny. Ultimately, those days became a cherished escape for both of them.