This video features better and fixed audio.

Lyrics:

I know you wanna leave me,
But I refuse to let you go
If I have to beg and plead for your sympathy,
I don't mind coz' you mean that much to me

Ain't too proud to beg, sweet darlin
Please don't leave me girl, don't you go
Ain't to proud to plead, baby, baby
Please don't leave me, girl, don't you go

Now I heard a cryin' man,
Is half a man with no sense of pride
But if I have to cry to keep you,
I don't mind weepin' if it'll keep you by my side

Ain't to proud to beg, sweet darlin
Please don't leave me girl, don't you go
Ain't to proud to plead, baby, baby
Please don't leave me girl, don't you go

If I have to sleep on your doorstep
All night and day just to keep you from walkin' away
Let your friends laugh, even this I can stand
Because I want to keep you any way I can

Ain't too proud to beg, sweet darlin'
Please don't leave me girl, don't you go
Ain't to proud to plead, baby, baby
Please don't leave me girl, don't you go

Now I've gotta love so deep in the pit of my heart
And each day it grows more and more
I'm not ashamed to come and plead to you baby
If pleadin' keeps you from walkin' out that door

Ain't too proud to beg, you know it sweet darlin'
Please don't leave me girl, don't you go
Ain't to proud to plead, baby, baby
Please don't leave me girl, don't you go
Baby, baby, baby, baby (sweet darling) (less info)