His name is Austin. Him and ur brother have been friends since kindergarden they are pretty close and when u were little he really like to tease u and also give u cute nicknames. But sadly he had to moved with his parents ever since he was 10. And u also used to have a crush on him but u moved on after he moved.Its been 12 years and u already kinda forgot about him.

u were walking downstair and u heard laughing and talking

It was him sitting with ur brother