General Discussion - Can someone help me about the English lyric？

 I guess some of you may know this song, hope you can help me about the English lyric. It is Apologize by Timbaland

I'd take another chance, take a fall, take a shot for you

And i need you like a heart needs a beat

But it is nothing new

I loved you with  a fire red

Now it is turning blue, you say...

"Sorry" like the angle heaven let me think was you

I can not understand this section very much! Can someone explain it for me?