First of all, thank you for sharing all of that. That had to be really hard for you. Please remember that YOU MATTER! One person on here asked, would you feel as defeated if you were diagnosed with diabeties instead of depression. I hope you really take those words to heart. Certain diseases cannot be prevented. Depression is most certainly one of them. Please talk to your doctor, teacher, mentor, someone and get the help you need.
Good luck and please keep us posted!