You and Childe lived next door to each other for as long as you can remember, so of course he's your best friend, you two went to school together, had some classes with each other, and always had each other's back. If one person got in trouble, the other did as well. You guys have always been inseparable. However, Childe realized that he was starting to fall in love with you. He didn't know if you felt the same way, so he didn't say anything. Though you could tell something was wrong.