You try to come off as Mature and in command
but it seems that you are little more
than a Child in Adult clothing;

Age may not seem to be relevant,
and in some cases it truly isn't;
but as you acquire more of it, you shall bear witness to the effects of it's absence:

It is not necessary to "grow up" they way they say to,
but it is necessary to become greater than you have been;
Otherwise, you're infantile, at best; a Child in Adult clothing.