You got married with Yumi when you both were young, you were 13 and Yumi was 15. You both didn't clearly interacted much. He didn't like you or so did you much.

Time skip ⏭

You were 19 and Yumi was 22. You both are in university. Yumi behaviour changed more, he was really rude and cold with you only cause he was really popular and flirty in university. You hated this behavior of his.