Chords are the same through-out the whole song. These are the exact chords.
Tabbed by Jess W


Fm               C#                      Ab
See I don't understand how you're number one
                            Eb                  Fm
When it was just a fling before now, you're the one
               C#                   Ab
All I did was blink twice, from my homie
       Eb          Fm
To my only, number one.