Welcome to PC. You can find a lot of support here. My daughter was very similar from 13 until 19. She definitely had depression because she had a suicide attempt. At around 19 she totally snapped out of it and is very happy and interested in school and gets good grades, wants to do new things etc. So it is possible things will get better as you get older.

In the mean time I would tell your parents of your struggles and that you think you may have depression. Get some professional help with this. You can't help it and need some help. People will think you are lazy and don't care so you have to tell them what is going on. You obviously care and want to be better.