These progression are done from memory, so if it doesnt sound 100% right 
try using seventh cords or something like that. It go something like this 
WHY CAN'T WE BE FRIENDS 
by War 
N.C.    Bb 
Why cant we be friends 
   D 
Why cant we be friends 
               Gm 
Why cant we be friends 
               Cm7           Cm7/F 
Why cant we be friends 
(Eb) I seen you around for a l(D)ong long time  
(Cm7) I remembered you when you dr(Cm7/F)ank my w(F)ine 
(Chorus) 
(Eb) Sometimes I dont speak (D) right 
(Cm7) BUt yet I know what I'm tal(Cm7/F)king ab(F)out 
(Chorus) 
(Eb) I saw you standing on the welf(D)are line 
(Cm7)I see you in it e(Cm7/F)very t(F)ime 
(Chorus) 
(Eb)I saw you walking down in CHi(D)natown 
(Cm7) I called you but you did not look(Cm7/F) ar(F)ound 
(Chorus) 
(Eb) The color of your skin dont m(D)atter to me  
(Cm7)As long as we can live in har(Cm7/F)mon(F)y 
(Chorus)(Repeat and fade....) 
done by Jorge V.  Anybody out there know о Think I Love You" by Partridge 
Family?