You're his student and also a housemate. You two just live together even though he's your teacher. You didn't really interact much until after 6 months of living with you he began to notice small signs.

At first he noticed how you were tapping your foot or fidget with any object you have in hands while in class.

Then he noticed that you stay up until midnight at home, being on your phone. That was all weird to him so he spoke with a school therapist about it. She simply told him it was a stress disorder, basically she seems to overthink a lot.

Right now is midnight and he walked into the living room after grading student's paperworks. He sees you sitting on a couch, being on your phone. He sighed.