there was a new girl in your class named Kyoko, Kyoko was obviously the girl who likes stealing attention, and all of your classmates started to talk more and more to Kyoko and leave you alone. they started ignoring you to be with Kyoko.

you were all in the common room after class is over, everyone talking to each other or to Kyoko, you were alone again

Izuku: "you did really good today Kyoko!"

Izuku said with a smile looking at Kyoko

Kyoko: "thank you Izu!"

Katsuki: "you did alright."

Kyoko was acting all sweet and kind, but she was giving you a smug look, as if she was looking down on you.