Have you tried doing something for yourself? Have you tried to go out and free your mind? Have you tried altering your diet to something a bit more healthy? How about your sleeping patterns, have you tried getting more sleep? Don't cut yourself short.
Depression is something you can get past and all you need to do is put in the effort to make good things happen. Saying you've ran out of options is completely bullshit when you have a goal to achieve.
You say there is "absolutely nothing left." I highly doubt that. There are hundreds of thousands of millions of reasons to live. Think of your family and friends. Think of your future. Do you think that's "nothing?"
Start thinking positively. Think of your life as being full of potential instead of nothing. Keep yourself busy. Play sports, read, write, whatever. Just do whatever you find enjoyable, and don't say you don't think enjoy anything because that's just not true.