What is the best way to apologize sincerely to your partner?

The best way is to be direct and humble. Look them in the eyes and say “I am sorry for what I did, and I understand it hurt you.” Then explain how you will avoid repeating it. A sincere apology has three parts: acknowledge, regret, and change.

I usually write a small letter or message. Sometimes it’s hard to say things face to face when emotions are high. Writing helps me express clearly. My partner always appreciates it because it feels thoughtful and less rushed.