Dearest {Recipient},

I'm very sorry for accusing you of cheating on me when you've been nothing but a wonderful, supportive, and faithful partner.

I'm sorry I lashed out at you like that. The way I behaved was really inexcusable and out of line; I shouldn't have let my past experiences influence how I treat you. I'm now working on my issues so that I can be a less paranoid and more trusting {boyfriend/girlfriend/spouse}.

I hope you can find it in your heart to forgive me. If you need more time alone, I completely understand. I'll patiently wait for your {email/text/call}.

Love,
{Your Name}

Dear [Name],

I am writing to apologize for my unfounded accusation against you. I understand that my words and actions were hurtful, and I regret that I caused you distress.

I want to apologize for the way I reacted when I accused you of [accusation]. I was wrong to make such an accusation without any evidence to support it. I should have taken the time to investigate the situation and gather more information before jumping to conclusions.

I understand that my accusation was unfair and unjustified. I should have taken the time to think before I spoke and realized that my words could have serious consequences. I should have been more considerate and thoughtful in my approach.

I am truly sorry for the hurt and pain I caused you. I understand that my actions were wrong and I am deeply sorry for the distress I have caused you. I hope that you can accept my apology and forgive me for my mistake.

I have learned from this experience and I am committed to being more thoughtful and considerate in the future. I will strive to be more mindful of the words I use and the impact they can have on others.

Once again, I apologize for my unfounded accusation and I hope that you can forgive me.

Sincerely,
[Your Name]

Dear [Name],

I am writing to apologize for my unjustified criticism of you. I know that it was wrong of me to make such comments without first taking the time to understand the situation.

I understand that my words must have hurt you and I am truly sorry for that. I can only imagine how it must have felt to have your hard work and efforts be met with such harsh words.

I want to assure you that I have taken the time to reflect on my actions and have come to the realization that I was wrong. I realize now that I should have taken the time to understand the situation before making any comments.

I am sorry for my behavior and I hope that you can forgive me. I understand that it may take some time for you to trust me again, but I want you to know that I am committed to making things right.

I promise to be more mindful of my words in the future and to take the time to understand the situation before speaking. I am also willing to do whatever it takes to make things right between us.

Once again, I am sorry for my unjustified criticism and I hope that you can forgive me.

Sincerely,

[Your Name]

Dear [Name],

I am writing to apologize for my unwarranted assumption about you. It was wrong of me to make assumptions about you without knowing the full story, and I am deeply sorry for the way I acted.

I understand now that I should not have made any assumptions without knowing the full context of the situation. I should have taken the time to talk to you and get to know you better before making any judgments. I realize now that my assumption was wrong and I regret the hurtful words I said.

I understand that my words may have caused you pain and I am truly sorry. I want to make sure that you know that I do not think of you in the same way as I did before. I now understand that you are a kind, compassionate, and understanding person.

I want to make sure that you know that I am committed to being a better friend to you and to not making assumptions in the future. I will take the time to get to know you better and to listen to what you have to say. I will also be more mindful of my words and how they might affect you.

Once again, I am sorry for the way I acted and for the assumptions I made about you. I hope that you will accept my apology and that we can move forward as friends.

Sincerely,
[Your Name]