How can i stop wasting time and feel more fulfilled to do work?

Ever since my summer classes ended I've just been feeling down.
At first I was able to continue doing stuff like drawing and reading, but now (as school approaches) I can't even do that.
I glance at my book, skim the page and get tired just from doing that. I pick up a pen, start drawing, get frustrated and stop immediately. It feels so tedious to do what was fun for me a week ago.
It's even worse because I have real work to do too!
I need to start raking in scholarship money, but how can I do that when I don't even look at any offers?

I just end up wasting time on the internet, watch youtube videos and chat with people online. I hate it.

EDIT:
To clarify, I am taking summer classes of subjects I actually care about. Part of me is anxious to go back to school because high school is miserable for me. Not even the "good" students care about anything; all the people there hate being there and don't seem to REALLY care about each other.