Hey friend, what happened to you?...(?)

You let me down
You let me down
You let me down
You let me down

How could you do that?...(?)
You let me down
You let me down
You let me down
You let me down

(blah blah)
You let me down
You let me down
You let me down
You let me down

(blah blah)
You let me down
You let me down
You let me down
You let me down

(blah blah)
You let me down
You let me down
You let me down
You let me down
[ Lyrics from: http://www.lyricsfreak.com/b/black+flag/you+let+me+down_10039498.html ]