Why was i put on this earth?

Why was i put on this earth?
I ask myself,
Maybe I was put on this earth to grow and laugh and play.
I never thought I would find myself doing the things I do,
afterall I'm just thirteen.
I'm not as innocent as I seem.. 
I have done drugs, 
I had sex beacause I had to take that hit.. 
I blacked out it was laced.
They took advantage of me.
so now I can't admit these things I just snort, shoot up, and smoke..
to make the pain go away.
I just wish someone would rescue me,
weres my support?
weres my superman,
to swoop down and save me,
from these awfull mistakes
I've made? So I ask you now;
why the hell was i put on this earth?