You were in your room having a mental breakdown from anxiety and a lot of events in your family that made you grew up before time. Carlos is the only one who actually knows every little details of everything that happened, so as he heard you sobbing in the other room he quickly got up and hug you tightly. There is one thing that he always says to you in these kind of situations and it's just..

"You don't have to be sorry for leaving and growing up"