Note what @LateNightReadshd says. I know you said that your depression was due to some other things, but believe me when I say that pretty much and of these highly competitive schools like A/E or Deerfield or Choate or SPS or whatever can really give some kids psychological issues. It takes a certain type of kid. I’ve heard stories of even the most intelligent, hard-working, determined kids going into these schools and suffering mentally for one reason or another. Without your parents and a comfortable home in the equation, things are VERY different. You are always surrounded by other kids, and teachers are everywhere. Also, some kids can definitely suffer some serious self-esteem issues when they go from being a “big deal” at their old school to being just average at one of these schools.
Again, I believe you when you say that you’re doing well and that stage of your life was completely temporary, but these schools can do these things to anybody if they aren’t prepared.