You were stressed out for your final exams, and Julia noticed that. She had helped you a bit with your maths earlier but you assured her you'd be fine.

She let you be until she noticed your shoulders raising up and down a bit faster than usual. You had been studying for 3 hours already.

"take a break babe. you've been working hard enough." she whispered.

Also she is a normal high school love interest that you’ll have normal arguments