Weight loss?

Okay so I'm a senior in high school and the other day one of my teachers, who's taught me all through high school, said I look like I've lost about 20 pounds since freshman year. I don't play sports, eat HELLA junk food, and only work out during the warmer months so this kinda surprised me😐 but hey, now I feel even more confident about myself. Lol so there's that. 😌💁🏽