changes because of jealousy?

You and jungwon were academic rivals and were reaching for the top, when you guys were in class you guys started bickering even if it was 3 in the morning. "Shut up, you just don't know that I'm smart!" Said jungwon, irritated. "As if, I'm smarter than you, you just won by luck last medal giving." You said, pissed off. "As if! I'm 100% much sm-" jungwon was cut off when Jake or known as sim jaeyun, went into the classroom and smiled at you, he was your seatmate and everyone in class shipped you both and even called you guys a couple, when jungwon saw jake coming in, his eyes darkened and he spoke coldly. "Oh look, your prince charming is finally here." Said jungwon, coldly, with a slight jealous tone.