Goodbye lyrics

Yeah, I got this thinkin' in my head
Yeah, you wanna say the things not said

What's the reason?

Don't really care if you leave
Just wanna see you beaten
Don't really care if you grieve
Don't really need a reason
[ Lyrics from: http://www.lyricsmode.com/lyrics/a/army_of_anyone/goodbye.html ]
Hey, goodbye
I wish you stayed here
I wish you were here

Yeah, I got this feelin' in my veins
Yeah, a helpless feeling mixed with pain

What's the meaning?

I just can't believe
That you're not really with me
I just can't believe
I wonder if you'll miss me

Hey, goodbye
I wish you stayed here
I wish you were here