Identify the song. What is the meaning? What story do the lyrics paint?

I missed your 21st birthday, I've been up at home, almost tried to call you, don't know if I should
Hate to picture you half-dr_nk, happy, hate to think you went out without me

I'm sorry if you blame me, if I were you I would, thought you'd see it coming, but you never could
I still haven't heard from your family, but you said your mom always loved me

Sometimes I go blurry-eyed, small talk and you tell me that you're on fire
Lights on and it's black and white, I couldn't stay forever

I see the look in your eye and I'm biting my tongue, you'd be the love of my life when I was young
When the night is over, don't call me up I'm already under

I get a little bit alone sometimes and I miss you again, I'll be the love of your life inside your head
When the night is over, don't call me up I'm already under

Audrey said she saw you out past twelve o'clock, just because you're hurting doesn't mean I'm not
If it doesn't go away by the time I turn thirty, I made a mistake and I'll tell you I'm sorry
"Sorry"

Sometimes I go blurry-eyed, small talk and you tell me that you're on fire
Lights on and it's black and white, I couldn't stay forever

I see the look in your eye and I'm biting my tongue, you'd be the love of my life when I was young
When the night is over, don't call me up I'm already under

I get a little bit alone sometimes and I miss you again, I'll be the love of your life inside your head
When the night is over, don't call me up I'm already under