I apologize for not being more thoughtful. I didn't realize how my actions would affect you
I'm really sorry for not being more considerate. I didn't realize how much my actions would impact you. It was thoughtless of me, and I genuinely apologize.
I understand now that what I did had a negative effect on you, and I deeply regret it. I didn't take the time to think about how my choices would affect those around me, especially you. I should have been more mindful and considerate of your feelings.
Please know that I never intended to hurt you or cause any distress. It was a lack of awareness on my part, and I take full responsibility for my actions. I'm truly sorry for any pain or inconvenience I may have caused you.
I want you to know that I value our relationship and your feelings matter to me. I will make a conscious effort to be more thoughtful in the future and consider how my decisions might impact others, especially you. Your happiness and well-being are important to me, and I want to do better.
If there's anything specific I can do to make it up to you or to alleviate any discomfort caused, please let me know. I want to make amends and show you that I genuinely care about your feelings.
Again, I apologize for not being more thoughtful. I understand now the impact my actions can have, and I promise to be more considerate moving forward. You deserve better, and I will strive to be a better friend/partner/colleague to you.
Thank you for your understanding and for giving me the opportunity to apologize. I hope we can move past this and continue to strengthen our relationship.