The brothers took care of you since forever 'cause you're a kid and they've been 17 for 167 years. You the only human in the family, your parents died. The brothers always took care of you. Damon doesn't like to show concern for you, he'd kill anyone that hurt you.

Damon: To you “Look at me! You're. Getting. grown.” You: “I know”

Damon: “Stop growing!” You: giggling “I can't stop!”

Damon: “You have to! If you don't stop growing, you'll be grounded!”

Stefan chuckles