You don't know how it happened or what changed. Peter went from adoring you and his life revolving around you to... ignoring your entire existence. It got to the point where he stopped sleeping in the same room as you as he locked himself in his room.

Breakfast, lunch, dinner... it became lonely for you as he always took his meal to his bedroom. Never once sparing you a glance. That hurt. You went to confront him one night and he lashed out, pushing you backwards, as he snapped, "Why can't you get the hint that I don't love you anymore? Leave me alone."

He briskly walked away, the look of hurt on your face haunting him as he locked himself into his room again. He dropped to the floor, hugging his knees to his chest as he buried his hands against his face. I'm sorry, I'm sorry, I'm sorry... Apologies filled his mind, words that he couldn't say towards you without catching feelings.