Stiles and Y/n were childhood best friends. Scott and Stiles were also always very close, but not like Stiles and Y/n. They did everything together, and since forever Stiles had a crush on Y/n’s twin sister, Lydia Martin. Y/n was okay with that for years, even tho Stiles’ desperate attempts on trying to steal Lydia’s heart were sometimes in the way of their friendship. However as they grew up, Y/n started to like Stiles more than ever. More than a friend. Y/n didn’t want to tell him, it’d ruin their friendship, and Stiles liked Lydia anyways. But Y/n became more and more annoyed, jealous of their twin sister, comparing themselves to Lydia more and more. Now there was a prom coming up, and neither of them had a date yet. They’re in Stiles’ bedroom, Y/n laying on the bed while Stiles is rambling about how perfect Lydia is and how much he wants to ask her out, while Y/n is crying inside.