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, guess its just to late I'm sorry I can't be perfect.:)

Might be:- "Perfect" by 'Simple Plan'
OR...
"Nothing Lasts Forever" by 'Echo & The Bunnymen'
Or by 'Gene Loves Jezebel'

Hope this helps you babes :)SLIM:)

Its definilty perfect by simple plan

I agree with everyone that the song your thinking of is Perfect by Simple Plan. Here are the lyrics for you.

Hey dad look at me
Think back and talk to me
Did I grow up according to plan?
And do you think I'm wasting my time doing things I want to do?
Because 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

Try not to think
About the pain I feel inside
Did you know you used to be my hero?
All the days you spend 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

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