Ok I don't know the whole song but I know part of it. It goes like this... nothing lasts forever I'm sorry I can't be perfect,now its just too late and we can't go back I'm sorry I can't be perfect. Thanks for your help:)

This it?


Simple Plan lyrics - Perfect (http://www.lyricsbox.com/simple-plan-lyrics-perfect-vs6fxdl.html)

Hey dad look at me
Think back and talk to me
Did I grow up according to planned?
And do you think I'm wasting my time
Doing things I want to do?
But it hurts when you disapprove all along

And now I try hard to make it
I just want to make you proud
I'm never going to be good enough for you
I can't pretend that I'm all right
And you can't change me

Because we lost it all
Nothing lasts forever
I'm sorry
I can't be perfect
Now it's just too late and
We can't go back
I'm sorry
I can't be perfect

I try not to think
About the pain I feel inside
Did you know you used to be my hero?
All the days you spent with me
Now seem so far away
And it feels like you don't care anymore

And now I try hard to make it
I just want to make you proud
I'm never going to be good enough for you
I can't stand another fight
And nothing's all right

Because we lost it all
Nothing lasts forever
I'm sorry
I can't be perfect
Now it's just too late and we can't go back
I'm sorry
I can't be perfect

Nothing's going to change the things that you said
Nothing's going to make this right again
Please don't turn your back
I can't believe it's hard just to talk to you
But you don't understand

Because we lost it all
Nothing lasts forever
I'm sorry
I can't be perfect
Now it's just too late and
We can't go back
I'm sorry
I can't be perfect