My friends say they're too big for my age (19)... Are they right?

Just turned 18 and I overheard my dads friends talking at my

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true