No. You are not "done".

You're a human. That means, however horrible you think you are, you are also wonderful. You are talented and keen. You are beautiful and determined. You are a great many good things, actually.

People want you here. You ARE HERE for a REASON. You can't just give up your chance to change the world! You should at least do the world a justice by staying around long enough to live out your reason! It doesn't matter how you may feel now because you know as well as I do that there is a little sunshine somewhere. That kind of miracle light-in-the-dark should be proof enough that you exist for something. Not everything is your fault. Not everything is your problem. Not everyone hates you. Ok? I'm not lying, but I would hate it if you were lying to yourself. You don't deserve to be dead.