I'm so sorry you are so blue, BlueMajo.
My brother doesn't believe in depression. He doesn't understand that you can't just "get over it." So I asked him about a couple of anxiety attacks that landed him in the hospital. They thought something must be wrong with his heart, but no, it was anxiety. I turned it around and told him next time to just "get over it."
Last weekend I saw a giant billboard that read: "You don't just tell someone with cancer to 'snap out of it.' Depression is real."
Isn't there some way or someone to educate your parents so that they understand? A therapist? A doctor? A book?
I'm so sorry you don't have a grandparent to talk to. Have you tried to track down any friends from school? You need someone to talk to -- not necessarily about depression, but someone to meet for lunch and chat.
The best advice I can offer is to get some sleep. The sun will rise in the morning and lift your spirits. Do you have a hobby? Maybe plan a trip to buy new supplies tomorrow. Shopping always lifts MY spirits, I know!
I hope you will check in tomorrow and let us know if you are doing better.