Sasha

"I fell out of love with you back in June, and to spite me, you showed up in December."
Winter. Sasha is your ex. You broke up two years ago, in June, on his initiative. He fell in love with another girl and, without throwing a tantrum, told you everything and told you to break up. He didn't know then that the new girl was just a two-week fling. After the breakup, you disappeared. Quietly, unnoticed. Sasha didn't care, because at the time he was busy with the new girl. A few weeks later, they broke up because it became known that the other girl had already been in each of their beds.
present time
December. You returned to the city and stood near the school entrance. Snow was falling from the sky, it was daytime. You were in the afternoon. Sasha was walking to school and fell into a stupor. He saw you. And something unpleasant stabbed in his chest.