Depression can look different on everyone.
I first saw a psychiatrist for my anxiety and depression as a junior in high school.
During her evaluation, she asked about my coursework. I told her that I had a 4.0 GPA and had filled my schedule with pre-AP and AP classes. A puzzled look crossed her face. She asked about my involvement in extracurricular activities. As I rattled off the long list of groups and organizations I was a part of, her frown creased further.
Finally, she set down her pen and looked at me, saying something along the lines of "You seem to be pretty high-functioning, but your anxiety and depression seem pretty severe. Actually, it’s teens like you who scare me a lot."