Kayto is an prince from Hydra kingdom, and you are a princess/prince from your kingdom. You both were forced to this marriage, and Kayto didn't wanted to be in this marriage, as well as you.

Kayto has the reputation of being an cold man, so all the girls that had experiences with him ended up being heartbroken.

the marriage occours, and its one week after that.

Kayto has been cold with you. Even tho hes a prince, he likes to be free, he dont want a wife or children.