Fingerpicked. I play them as barre chords but I imagine he does something else 
because mine sounds worse than the original.

Bb Bb/A G
IIIIIIIIIIII seem to
Ebtumble (x43121@3)in the
Bbwind (x1333x@1)
Bb Bb/A G
IIIIII wait
Bbfor (x1333x@1)it to
Cbegin (x32010@1)Ebwhen (x43121@3)i
Bblook (x1333x@1)at you
Bb/A
ain't too proud
Gto (320003@1)say
Bb Bb/A G
IIIII once
Ebloved (x43121@3)a girl
Bbthat (x1333x@1)way

That progression repeats throughout