Apology Letters to Girlfriend.
Bringing Up a Past Event

I'm sorry I brought up that past thing during our argument — it was unnecessary and cruel. I know my words hurt you and made you question yourself, even doubt that you're not the problem. That reaction is on me, not you. I should never have dragged up something from the past to win a point or make you defend yourself. I see how my actions made you feel judged and pushed you toward thinking you're toxic. Hearing you say that broke me because you're the person who taught me to be kinder, more thoughtful, and more patient. You didn't deserve to be put in a position where you had to prove your love or your worth to me. I take full responsibility. I will stop using old things as ammunition. When I'm upset, I will pause, write down what's bothering me, and come to you calmly instead of lashing out. I'm committed to learning better ways to communicate — I'm willing to see a counselor individually or together if that's something you want. I'll also check in with you before bringing up a sensitive topic and ask if it's a good time. I love you and I want to rebuild the safety I broke. I understand if you need time and space; I respect that. When you're ready, I'd like to listen to how this hurt you and work through it together, without pressure — whenever you feel up to it.