The lyrics for "How Long" by Charlie Puth begin as follows: [Intro]
Alright
Ooh, yeah [Verse 1]
I'll admit, I was wrong, what else can I say, girl?
Can't you blame my head and not my heart?
I was drunk, I was gone, that don't make it right, but
Promise there were no feelings involved, mmh [Pre-Chorus]
She said, "Boy, tell me honestly
Was it real or just for show?", yeah
She said, "Save your apologies
Baby, I just gotta know..." [Chorus]
How long has this been goin' on?
And you've been creepin' 'round on me
While you're callin' me "baby"
How long has this been goin' on?
You've been actin' so shady
I've been feelin' it lately, baby And the lyrics continue with variations of the chorus and verses about mistrust and questioning honesty in a relationship. This is from Charlie Puth's popular song "How Long." If the full lyrics text is needed or from another artist, please specify. The above is the primary known song titled "How Long" by Charlie Puth.

There is another "How Long" song by Paul Carrack with different lyrics if that is of interest.