A romance anime where the girl eats a lot of food in order not to stand out
Looks like Ao Haru Ride aka Blue Spring Ride (MyAnimeList page). 

Description from Wikipedia: 


  Futaba Yoshioka wants to "reset" her life. In junior high, girls ostracized Futaba because too many junior high boys liked her. The only boy Futaba liked, Kou Tanaka, moved away before she could tell him how she felt. Now in high school, Futaba is determined to be unladylike so her new friends will not become jealous of her. While living her new life contentedly, she meets Kou again, but he now uses the name Kou Mabuchi and has a cold attitude. He tells her that he liked her too in junior high, but feels differently now.