I don't want to be a grown up today

I don't want to be a grown up, I don't want the responsibility, the bills, the headaches etc. I don't want any of it- but how do you get out, you can't. I am having my second breakdown today about this crap and I hate not being in control of my life. I hate the uncertainty and the insanity of it all, I want the simplicity I remember when I was younger- I want my sanity back I don't want this headache.