Apology Letters to Girlfriend.
Acting Out of Fear and Insecurity

I am deeply sorry for letting my fear and insecurity make me behave in ways that hurt you and damaged the trust between us. I allowed jealousy and nervousness to control my words and actions, and for that I take full responsibility. I know I made you feel sad, disrespected, and unsafe in our relationship, and I am truly sorry for the pain I caused. There is no excuse for my behavior. I did not mean to hurt you or involve anyone else in my thoughts — my feelings have always been for you alone — but I understand that intention does not erase the harm. I see how my actions undermined your sense of dignity and turned something that should be supportive into something hurtful. To make this right, I will begin working on my insecurity in concrete ways: seeking counseling to learn healthier coping strategies, practicing honest and calm communication instead of accusations, and giving you the space and respect you deserve. I will also set clear personal boundaries to stop behaviors that pressure or upset you. I know I am not automatically worthy of forgiveness, but if you are willing, I ask for the chance to rebuild your trust through consistent change. When you feel ready, I would like to listen to how this affected you and discuss what you need from me moving forward. I will respect your time and your decision.