I think I'm scared that I violated a friend
What makes you worry you violated your friend?
I asked her for a favor involving a personal matter without knowing if it might offend her.
It's definitely better to think about whether someone might offend someone or violate their trust before you ask. You should talk to your friend about this and try to explain your intentions in asking the favor.
I convinced myself that my friendship is stronger than this. I feel better now.
That's great, and that you learned what the boundaries are in your relationship. She would be happy you know when to stop, and your relationship can only get stronger like this.