"Although I loved my father, learning to forgive
him his betrayal was a struggle in itself. Inside, I was torn apart; I could not forget the pain my father had caused, but I knew he deserved to be forgiven"
Wouldn't it be "love my father" since you still love him? I'm not sure.
I think "I was torn apart inside" is more direct than "Inside, I was torn apart", but it is probably just a difference in style.
"The lessons I have learned from this experience have, since then, impacted my future."
This is too wordy. Also, how does something "impacted" your future? I don't think the tense is right.
I believe something like "The lessons I have learned from this experience had a big influence on me." will be better.
"If I ever encounter a similar setback, I can confidently say that I will be able to confront the situation as a maturing adult with even more fortitude and trust."
This sentence is rather wordy and awkward. I don't think you should add it. But you need to somehow answer this: "If something similar happened in the future, how would you react?"
Good luck!
Henry Lin