Trace Adkins - Help Me Understand2 Chords

HELP ME UNDERSTAND
(one of the greatest songs of all-time!!!!)

(Intro)

(G)     (C)(G)    (C)    (D)
(G)     (C)(G)    (C)   (Csus)   (D)    

(G) Once (Am7) (G/B) in a (C) lifetime (D)
(G) You'll (Am7) open (G/B) up your (C) heart (D)
Maybe (G) once, (Am7) in (G/B) your (C) lifetime (D)
(G) You'll swear to (Am7) never (G/B) be (C) apart (D)
You (C) think you're love's on (D) solid ground
When (C) out of the blue
It all comes (D) tumblin' (G) down

Who's gonna (Am7) hold (G/B) me (C) tonight
When I'm (D) feeling lonely (G) 
Who's gonna (Am7) show (G/B) me the (C) light
Cause I (D) need to know
(Em7) With all the (Bm/D) things we've got
(C) How can love (G/B) just stop
(Am7) Tell me...somebody (C/D) help me understand (G)

And my picture, (Am7) (G/B) in your (C) locket (D)
(G) What will (Am7) you do (G/B) with it (C) now (D)
All our (G) friends (Am7) (G/B) ...all the (C) memories (D) 
(G) Tell me (Am7) how to (G/B) sort them (C) out (D)
What's (C) yours is yours - what's (D) mine is mine
Is that (C) all that's left
After (D) all this time (G)

Who's gonna (Am7) hold (G/B) me (C) tonight
When I'm (D) feeling lonely (G) 
Who's gonna (Am7) show (G/B) me the (C) light
Cause I (D) need to know
(Em7) With all the (Bm/D) things we've got
(C) How can love (G/B) just stop
(Am7) Tell me...somebody (C/D) help me

Under(F)stand
Why I'm not a (G/F) part of your plan
And you don't need me any(G)more
Help me under(F)stand
why I still want to be (G/F) where you are
Even though I (Em) know in my (Dm7) heart
You don't (G/A) love me (D) anymore (G)

Who's gonna (Am7) hold (G/B) me (C) tonight
When I'm (D) feeling lonely (G) 
Who's gonna (Am7) show (G/B) me the (C) light
Cause I (D) need to know
(Em7) With all the (Bm/D) things we've got
(C) How can love (G/B) just stop
(Am7) Tell me...somebody (C/D) help me understand (G)