I know the feeling, and that sucks, but we will get through this too, Im pretty sure. It seems that for us is just time taking. We need to give it more time to be able to improve our speech. However, mine is a little different, I talk kind of the same in a group or with one person only (kind of) I just cannot improve my english speaking skill in general, and that worries me. Based on what others said, I need to be more active socialy and enroll to different classes to talk more. In your case tho, everything gets better when you get older. High school atmosphere is just sucks. When you step into 25, 26 you will care less about your stutter and talk more openly in groups.