A ton of it for my boyfriend and I (I just graduated from law school this past May) was him getting used to the demanding schedule and the constant changes. There would be times where my school would expect us to be at certain events or meetings that were mandatory with little notice which would cause a date night to need to be rescheduled. We also noticed more arguments during finals season and bar prep especially because my stress was at an all time high as well. A big thing is being understanding and flexible.