The bass line to this song is really simple and it took 
me about half—an—hour to learn the whole bass line. 
Anyway, this is a really nice song to play so here it is...
I dont know the exact tempo but space it out as medium — medium fast.

VERSE 1
G |————————————————————————————————|
D |——————————————————6—6—6—7—7—7—7—|
A |7—7—7—7—7—7—7—7—7———————————————|
E |————————————————————————————————|

VERSE 2 
G |————————————————————————————————|
D |————————————————————————————————|
A |————————————————————————————————|
E |0—0—0—0—0—0—0—0—0—4—4—4—5—5—5—5—|

BRIDGE
G |————————————————————————————————|
D |————————————————————————————————|
A |2—2—2—2—2—2—2—2—0———————————————|
E |————————————————————————————————|

CHORUS
G |————————————————————————————————————————————————————————————————|
D |————————————————————————————————————————————————————————————————|
A |————————222222224444444400000000————————222222220000000000000000|
E |00000000————————————————————————00000000————————————————————————|

LEAD ONTO GUITAR SOLO
G |—————————————————————————————|
D |—————————————————————————————|
A |——————————4444———————————————|
E |2222——4——5————2222——4——5—————|

FINAL 3RD
G |———————|
D |———————|
A |———————|
E |0—0—0—0|

VERSE 1 x 6
VERSE 2 x 2
BRIDGE
CHORUS 
VERSE 2 x 2
VERSE 1 x 4
VERSE 2 x 2
BRIDGE
CHORUS x 2
LEAD ONTO GUITAR SOLO
Guitar solo...so that means you take a rest...
FINAL 3RD
VERSE 2 x 2
CHORUS x 2
VERSE 2 (stop abruptly after playing last note)

I hope you enjoy playing this bass line...have fun!