Simple design

I live a chemical life i'm on a mission to try you
went insane for the day i'll have to shove it away
my only option is gone smile as they break and they fall you want
a simpler life you cant erase what was mine you must be
out of your mind this was a simple design you f*** it up
every time how could you leave me behind its alright
cause i know what you want but you'll just have to
wait if i had it to give i would give it away i'm
living it up while i'm falling from grace there's no way
that i'm running away i'm used to making it worse
made up of four letter words you want to know what
it was now isolated and gone you fall apart at the seams
i'll never know what it means try not to pull it apart
your aiming straight for the heart you had to be the
worst for me i don't know what to say so let me be and now
i find you've left me behind i don't know what to say so
never mind your mine