things ain't how they used to be

It was the songs that represent my whole feelings now and if you found it, The recent song in my mp4 was

The Sun
- Maroon 5-

After school, Walking home
Fresh dirt under my fingernails
And I can smell hot asphalt
Cars screech to a halt to let me pass
And I cannot remember what life was like through photographs ?
Trying to recreate images life gives us from our past

And sometimes it’s a sad song. . . .

Reff :
But I cannot forget, Refuse to regret
So glad I met you, Take my breath away
Make everyday with Worth all of the pain that I have gone through
And mama I’ve been cryin’ Cause things ain’t how they used to be
She said the battles almost won?
And we're only severals from the sun....

Moving on down the street
I see people I won’t ever meet
Think of her, take a breath
Feel the beat in the rhythm of my steps
And sometimes it’s a sad song

Reff :
But I cannot forget, Refuse to regret
So glad I met you, Take my breath away
Make everyday with Worth all of the pain that I have gone through
And mama I’ve been cryin’ Cause things ain’t how they used to be
She said the battles almost won?
And we’re only several miles from the sun

The rhythm of her conversation
The perfection of her creation
The *sex* he slipped into my coffee
The way he felt when he first saw me

Hate to love and love to hate him
Like a broken record player
Back and forth and here and gone
And on and on and on and on

But I cannot forget, Refuse to regret
So glad I met you, Take my breath away
Make everyday with Worth all of the pain that I have gone through
And mama I’ve been cryin’ Cause things ain’t how they used to be
She said the battles almost won?
And we’re only several miles,
She said the battles almost won?
And we're only severals from the sun....

Dont get whats the meaning of the sun? I think the comment of F_wyatt represent all the meaning to you :

"this is a sad, dark song, meant to invoke feelings of what could have been, and really has nothing to do with things ever getting better. and that's the point.

it's not a song of hope, but of desperate. if it moves you to let something go or lose something that good, then great. sometimes even sad songs can stir the right emotions.

"the battle's alomst won" (we finally figured it out whats will gonna happen)
"and we're only several miles from the sun" (too late to change of course, we're about to the end...)

it means : "late"

PS. : why things ain't how they used to be, God ?