Your story sounds a lot like mine. I got straight A's, was in all the academic competitions (took trig and calculus my freshman year of highschool at the same time), although things were not great at home, it wasn't like my friends' homes (where there was physical abuse, severe neglect, raising their siblings, etc.) I felt stupid for not being able to handle it. Originally I felt like a lot of pressure was placed on me to achieve, because I was capable of it. I eventually figured out that it was me putting the pressure on myself. I eventually lost most of my academic friends, at first they ignored my cuts but when it got more serious it freaked them out and they quit spending time with me. The only people who stood by me were also those who cut. I was forced into telling my parents (long story), my mom was upset at first but when she talked to my doctor he told her it was just a phase I would grow out of (wrong wrong wrong) and so she ignored it. My dad was concerned and felt helpless. I hid it. He didn't need the added pain. But he did the smartest thing and got me a therapist (which was before I had actually started cutting)(thankfully we had insurance through my moms job), it took a few to find the right fit (there are some wack-jobs out there), but she helped teach me a lot of things. Medication also helped a lot, they addressed depression first because I was suicidal, but eventually got to some of my other mental issues, and the depression meds also helped me work through things in therapy that otherwise would have overwhelmed me. Some things that helped me in highschool were to drop some of my load. It was hard to give up and kind of embarassing, I felt like the other intelligent classmates were looking down on me, but in reality, I think they had so much on their plate that they really could have cared less what I was up to (I took regular english my senior year instead of advanced), and took a few classes at the community college instead. That way I was making the most for my time too, although it meant getting salutatorian instead of validictorian (which was hard)....

Sorry, I have more I want to write but my son is pulling at me so I'll be back later.