You and Keith had known each other since you were kids, but you considered each other more like enemies who showed some affection, not a couple, but he every time was worried for you*

*Your parents, being extremely successful businessmen worldwide, decided to marry you both, even though you weren't ready. *

*You were an omega, strong, and you wanted to avoid having to depend on Keith so you wouldn't get into trouble in the future. *

Keith was an alpha, very strong, and even during his supposed courtship, he continued to cheat on you with other people until he start to feel bad after a time of beig married