Trey Songz - Heart Attack chords

Em-G-D-C the whole song

Em                             G
We share, somethin' so charming, still so rare,
           D                        C
and I'm in awe, never been here before,
[ Tab from: http://www.guitaretab.com/t/trey-songz/314786.html ]
Repeat Em-G-D-C throughout whole song
Em                           G
so high, we're still climbing,
                       D   
even here inside these walls, 
                     C
breaking each others hearts,
and we don't care 'cause we're so,
into deep can't think about givin' it up,
but i never knew love, would feel like a heart attack,
it's killing me, swear i never cried so much,
'cause i never knew love, would hurt this fucking bad,
worst pain that i ever had,
never knew love, would hurt this fucking bad,
worst pain that i ever had,
All the times when i know i should be smilin',
seem to be the time, that i frowned the most,
can't believe that we're still survin',
'cause I'm slowly breakin' down,
even when i hold you close,
And if i lose you, 
I'm afraid i would lose who,
who i gave my love to,
that's the reason i stay around,