Guess the song

I know I f*d up, I'm just a loser
Shouldn't be with ya, guess I'm a quitter
While you're out there drinkin', I'm just here thinkin'
'Bout where I should've been
I've been lonely, mm, ah, yeah
Water pouring down from the ceilin'
I knew this would happen, still hard to believe it
Maybe I'm dramatic, I don't wanna seem it
I don't wanna panic
I'm a sad girl, in this big world
It's a mad world
All of my friends know what's happened