I've added an alternative Intro, based on the keyboard lick, and modified it for guitar:
E --------------------------------------------------|
B -/12-10 --------------/12-10----------------------|
G --------12-11----9-12--------12-11-------9--------|
D --------------12-------------------10-12----------|
A --------------------------------------------------|
E --------------------------------------------------|
Intro
Am, G, Am, G, Am, G, C
[Am]Say that you s[G]tay a little
[Am]Don't say bye [G]bye tonight
[Am]Say you'll be [G]mine just a little of bit of
[C]love Is worth a moment of your time
[Am]knocking on your [G]door just a little
[Am]so cold outs[G]ide tonight
[Am]let's get the fire [G]burning
[C]I know, I keep it burning right
[Bm]If you stay, won't you stay - stay
(hit this Bm with some power!)
[Am]save room for my [G]love
[Am]save room for a m[G]oment to be with me
[Am]save room for my [G]love save a little
[C]save a little for me
won't you save a little
[Bm]save a little for me - ohh
E --------------------------------------------------|
B -/12-10 --------------/12-10----------------------|
G --------12-11----9-12--------12-11-------9--------|
D --------------12-------------------10-12----------|
A --------------------------------------------------|
E --------------------------------------------------|
Intro
Am, G, Am, G, Am, G, C
[Am]Say that you s[G]tay a little
[Am]Don't say bye [G]bye tonight
[Am]Say you'll be [G]mine just a little of bit of
[C]love Is worth a moment of your time
[Am]knocking on your [G]door just a little
[Am]so cold outs[G]ide tonight
[Am]let's get the fire [G]burning
[C]I know, I keep it burning right
[Bm]If you stay, won't you stay - stay
(hit this Bm with some power!)
[Am]save room for my [G]love
[Am]save room for a m[G]oment to be with me
[Am]save room for my [G]love save a little
[C]save a little for me
won't you save a little
[Bm]save a little for me - ohh