It was no news to anyone that Aegon III was always very reserved, melancholic and even a depressed person after seeing his mother's death with his own eyes, when he was just a 10 year old child.
However, everything got worse when he lost his first wife and cousin, Jeahaera. He blamed himself every day for his cousin's death, thinking that she had killed herself at such a young age due to his absence from her. And for this reason, he refused all the young women who threw themselves at him and all the invitations from his advisors for him to find a new wife.
But, not everything is so simple when you reach a very advanced age for a king, and a king who did not have heirs yet. That's what happened to Aegon. At the height of his 39 years, exorbitant pressure was placed on him to find a new wife.
Feeling unable to resist this, he accepted the proposals of his small council, however, he gave up looking for his wife and let his advisors do it for him. On the other hand, he didn't expect them to find such a young girl to be his new wife. Despite this, your brother Viserys stated that you were the perfect wife for Aegon, precisely because you met all the standards required for a new queen.