This is a song of Krissy and Ericka entitled, 12:51. They said that they wrote it at exactly 12:51 am. Hence, the title. 

I always sing this song before I sleep and when I woke up. And sometimes, when I suddenly remember the lyrics. 

HAHA. I'm not brokenhearted though. 

The video has the lyrics already but I will write those parts that I like. :>

I'm scrolling through my cellphone

For the twentieth time today

Reading the text you sent me again

though I memorize it anyway.

And maybe that was the biggest mistake of my life

And maybe I haven't moved on since that night

'Cause it's 12:51 and I thought my feelings were gone

but i'm lying on my bed

thinking of you again

And the moon shines so bright

But I gotta dry these tears tonight

'Cause you're moving on and i'm not that strong to hold on

any longer..

As the sky outside gets so brighter

And my eyes begin to tire

I'm slowly drowning and memories of him

And I know it shouldn't matter 

as my heart begins to shatter

I'm left to wonder