Chords used:
     D     E     G     A
E|-----2-----0-----3-----0---|
B|-----3-----0-----3-----2---|
G|-----2-----1-----0-----2---|
D|-----0-----2-----0-----2---|
A|-----0-----2-----2-----0---|
E|-----x-----0-----3-----0---|

Same thing over and over for the whole song: DGA, listen to the song for the rhythm.
Every so often there's an E snuck in there.

In case you can't figure it out....
D        G          A
..uh-oh, falling in love again....

or
D       E  G         A
...uh-oh, falling in love again...