Hello, Memememememe!
I trust your perceptions of these folks. The problems are too big to hide for long. Do you think you could find it within you to boldly go to your parents or the assistant principal and tell them directly that you are in distress? I ask this because it is probably better for you to reveal the issue than for them to discover it. If you take the initiative, there's a greater chance they will see you as a partner in getting better than just a passive person to be helped.