Your aunt can see how much you grew. You can’t, because you were there for every inch.

Change is invisible at close range. You were present for every single day of it, so each version of you handed off to the next with no obvious line between them. Somebody who has not seen you in a year gets the two versions side by side and the difference is immediate. They are not just being nice, they have the distance you do not.

When someone tells you how much you have changed, believe them rather than brushing it off. Ask what specifically they noticed. Their answer is data you cannot collect on yourself.