Most epic Young Adult literature breakups and makeup: Stelena

Elena and Stefan
“The Fury” (Vampire Diaries, Book 3) and “Dark Reunion” (Vampire Diaries, Book 4)

THE BREAKUP: After human Elena becomes a vampire, Elena awakens and attacks her vampire boyfriend Stefan after viewing him as a threat. The fight leaves Stefan broken-hearted and assuming that her attack on him meant she loved his vampire brother Damon more.

THE MAKEUP: A love that even beats death, Elena comes back as an angel so that her and Stefan can be reunited again.

Source: Examiner.com