I know that what happened hurt you, and I am truly, deeply sorry. I never wanted to make you feel the way I did, and I take full responsibility for my words and actions. You deserved so much better from me, and I regret every moment that caused you pain. This letter comes straight from my heart — imperfect, but completely honest.
What I said came out all wrong, and it doesn't reflect what I truly feel. What I meant was simply that I care about you — more than I know how to express sometimes. I was not trying to hurt you. I was scared, and instead of being honest, I said something I didn't mean. Please know that my intentions were never to make you doubt yourself or us.
You are one of the most important people in my life. Your smile is the thing I look forward to, your voice is my calm in every storm. You make ordinary moments feel like something worth remembering. Losing your trust would mean losing something irreplaceable — and that is something I am not willing to let happen. You mean the world to me. More than words ever could say.
"I will do better. I promise."
— your sibling, always