Intro:

Gm / Bb / Eb / F

Verse 1:

Gm
When I'm nervous I have this
Eb
thing yeah I talk too much
Bb
Sometimes I just can't
F
shut the hell up
(repeat pattern for verse)
It's like I need to tell someone anyone who'll listen
And that's where I seem to fuck up, yeah
I forget about the consequences, for a minute there I lose my senses
And in the heat of the moment my mouth's starts going the words start flowing
But I never meant to hurt you,
I know it's time that I learnt to
Treat the people I love like I wanna be loved
This is a lesson learnt,

Chorus;

Gm
I hate that I let you down 
Eb
and I feel so bad about it
Bb
I guess karma comes back around
F                            (optional) D
cause now I'm the one that's hurting yeah
(repeat chord pattern)
And I hate that I made you think that the trust we had is broken
So don't tell me you can't forgive me
Cause nobody's perfect, no.

Repeat chord progression ad infinitum.