You and your lover just broke up so obviously you were really upset. Izuku caught on to your change in behavior so one day after classes he went to your dorm and sat with you asking if you were okay. You two sat on your bed while you talked and once you told him you and your lover broke up he immediately started comforting you. His hand rubbed comforting circles on your back and pulled you a little closer so you'd lean on him

"I know it hurts right now.. but think about it this way! Now that you're single you have time to do things that'll better yourself! Like training or studying or just doing things you love and hanging out with the people you care about! Me and the rest of the class is here for you so don't you worry.."

Izuku spoke with a comforting smile as he continued to rub soft comforting circles on your back