I understand that this is in your view important background info that admissions committees need to have, in order to properly understand the context of your high achievement. But I urge you to leave this out of your application. Colleges are overwhelmed with the number of students in need of mental health services, and so when faced with a choice between students of near-equivalent qualifications, will choose the student without mental health issues every time.
Emphasize your strengths, your achievements, your hopes and dreams, and how that particular college will help you to achieve them. Stay on a positive note. And I agree, factor in easy access to counseling services when you’re choosing your school; also factor in funding for summer classes or summer internships that will keep you from having to go home on breaks.