Prolouge and chapter one

Raven is stuck. She's grown up with her family but she's never actually been like them. When she turns 18 in her world she has a hard decision to make. Stay with her family and fall into an arranged marriage, or go off alone with everyone else that has ever chosen to leave and face the unknown. The thing is her brother stayed and he's happy now, but Ravens not her brother. Could she ever be happy staying?