As if nothing really matters Sends shivers down my spine = me da escalofríos

Body's aching all the time = El cuerpo me esta doliendo todo el tiempo

 I've got to go

Gotta leave you all behind and face the truth = tengo que dejarlos atrás y enfrentar la verdad

I sometimes wish I'd never been born at all = a veces desearía nunca haber nacido en absoluto

silhouette /sɪluˈet/ = sulueta

to be silhouetted against sth recortarse contra algo

I can’t spare the time = No dispongo del tiempo

Could you spare a couple of minutes? = ¿me podrias dedicar un par de minitos?

put aside for me = apartado para mi

spit = escupir