Well, I don't really know anything about your situation, but the best thing I can tell you is that only you can truly fix (for lack of a better word) yourself. 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.
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10/22/78 - 1/28/09...My cousin, my best friend, and my brother...R.I.P.