This is my first tab so sorry if make mistakes.

Capo on the first fret

Em
Papa I know you're going to be upset
D
'Cause I was always your little girl
C
But you should know by now
D          Em-D
I'm not a baby

Em
You always taught me right from wrong
D
I need your help, daddy please be strong
C
I may be young at heart
D                     Em-D
But I know what I'm saying
C           D
The one you warned me all about
C           D
The one you said I could do without
C           D            Em        D               C    
We're in an awful mess, and I don't mean maybe - please

Chorus:
Em   D     C       C     D        Em
Papa don't preach, I'm in trouble deep
Em   D    C        C    D          Em
Papa don't preach, I've been losing sleep
Am                     Em
But I made up my mind, I'm keeping my baby, oh
Em   D  C  C D Em
I'm gonna keep my baby, mmm...