I think he's singing about a drug addiction...
'dissolved the life of me...you crawled inside of me...you took it all from me...' What drugs did.
'you walked away from me' the feeling he had left and he couldn't get the high he wanted anymore
'hooked on junk...' hooked on drugs and now that he sees how things are, it's no longer a nice thing, to him its miserable and drugs are junk.
'Wake up' - realize what's happening, get out of this.
'for what?' it's pointless, he's allready ruined himself enough or there's no way cause he'll keep coming back,
I think he's singing about a drug addiction... 'dissolved the life of me...you crawled inside of me...you took it all from me...' What drugs did. 'you walked away from me' the feeling he had left and he couldn't get the high he wanted anymore 'hooked on junk...' hooked on drugs and now that he sees how things are, it's no longer a nice thing, to him its miserable and drugs are junk. 'Wake up' - realize what's happening, get out of this. 'for what?' it's pointless, he's allready ruined himself enough or there's no way cause he'll keep coming back,