[Verse 1]
Girl, I miss you when I hear that song
And every time I turn on the radio, it comes on
I've tried whiskey and I've tried wine
Only works for a little 'til you're back on my mind

[Chorus]
Yeah, I must be lonely, yeah, it must be midnight
You ain't pickin' up, must be somebody holdin' you tight
Yeah, I must be sinkin', thinkin' 'bout too much
'Cause here I am at 5 AM and the sun's comin' up
Yeah, I must be hurtin' and it must be just me
Girl, nothing's workin', I must be lonely
Mm, I must be lonely

[Verse 2]
It kinda feels like, like I don't know me
I lost myself, life went to hell when you left me
I never stay up this late, starin' at the ceilin'
But I can't see straight, never felt this way, I hate this feelin'

[Chorus]
Yeah, I must be lonely, yeah, it must be midnight
You ain't pickin' up, must be somebody holdin' you tight
Yeah, I must be sinkin', thinkin' 'bout too much
'Cause here I am at 5 AM and the sun's comin' up
Yeah, I must be hurtin' and it must be just me
Girl, nothing's workin', yeah, I must be lonely
[Bridge]
Yeah, I must be lonely, mm
Yeah, I must be lonely
Yeah, I must be lonely, damn
Yeah, I must be lonely

[Chorus]
Yeah, I must be lonely, yeah, it must be midnight
You ain't pickin' up, must be somebody holdin' you tight
Yeah, I must be sinkin', thinkin' 'bout too much
'Cause here I am at 5 AM and the sun's comin' up
Yeah, I must be hurtin' and it must be just me
Girl, nothing's workin', I must be lonely

[Post-Chorus]
I must be lonely
Yeah, I must be lonely

[Outro]
Mm, yeah, I must be lonely