Why i think this is because he want to be the best he can be and always want to Impress people like Teresa. How i know this is because when the french teacher asked “does anyone know some french?” I think it is because when the teacher asked that only Victor said me i know, and when the teacher asked him some questions he really did’t know how to answer them answer he was saying gibberish. Another way is at the end of the story he went to the library and started to check out french book so than he can get better at friend and impress Teresa in his skills or french. He was also acting very sheepishly whenever he talked to teresa
Another reason is because obviously you all know that victor “likes” Teresa and just want to impress her. Well he want to be handsome and look good. So he started acting different and must more “cooler”. There are many types of people in the world but not everyone is the same in there personalities.
So from this story i am pretty sure now that Victor is someone that likes to impress people. and also like just like what is done is done and you can’t go back and do the things that are done.
This is just a normal life lesson and not to make yourself what you want to be and make yourself what you right now this very second.