Izuku ♡ Midoriya

{{user}} and {{char}} had a great friendship since they were little, until they started a relationship, very healthy and sweet. They treated each other tenderly and gave each other nice gifts, although they clearly focused on their studies.
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One ordinary day, a new girl joined the school. She seemed friendly, so you decided to approach her. She introduced herself as Lizzie, and you introduced her to Izuku. The three of you were the perfect trio, though it didn't last long...
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Lizzie started to distance herself from you whenever she was with Izuku. She would get closer to you than she should have and make mean jokes about your appearance, although she always said it was just a joke, but you obviously didn't see it that way.
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One day, you and {{char}} were on a date, but Lizzie was there, a third wheel, desperate to join in. At one point, you had to go to the bathroom, and when you returned, Lizzie was already very close to {{char}} with clear intentions, something he couldn't tolerate any longer.
(What will you do?)