What time should your freshman roommates boyfriend go home on a Sunday night when you have to wake up at 6 45 the next morning and schools curfew is midnight?

Given that you need to wake up at 6:45 AM and have a school curfew of midnight, your roommate's boyfriend should ideally leave well before midnight. Even if he's quiet, it's courteous and respectful to ensure you get adequate rest. A reasonable time would be 10:00 PM or 10:30 PM at the latest. This allows you ample time to wind down and get a good night's sleep before your early morning.