I am writing to apologize for the unhappiness I have caused you due to my unfaithfulness. I know that my actions have caused you a great deal of pain and I regret that more than anything. I feel deeply regretful and ashamed of myself for my actions and I understand that no apology can undo the pain and hurt I have caused you.
I realize that nothing I can say or do will make up for my mistake, but I want to assure you that I am taking steps to ensure that I never make this mistake again. I am taking the time to reflect on my actions and learn from my mistakes. I am also taking the time to work on myself and become a better person.
I have been reflecting on my actions and I understand that my behavior was wrong. I have been struggling with a lot of things lately and I should have handled them differently. I should have been honest with you and I should have talked to you about my feelings instead of turning to someone else.
I am truly sorry. I want to make things right and I am willing to do whatever it takes to make it up to you. I want to rebuild the trust and faith I have broken and I want to be a better partner to you. I know it will take time and I am willing to do whatever it takes to make it up to you.
I understand that it will take time for you to forgive me and I am willing to do whatever it takes to earn your trust back. I am committed to rebuilding our relationship and I am willing to put in the effort to make it work.
I know I cannot undo the hurt I have caused you, but I hope that you can find it in your heart to forgive me and give me another chance. I love you and I want to make things right.