Apologize to your boyfriend and save the copied sentence.

From the bottom of my heart, I want to apologize to you. I know that my mistake hurt you and I feel very guilty. I should respect your feelings more and be more considerate of your feelings. I admit that I did something wrong, but I really hope that we can be partners with each other again. This time I will try my best to rebuild the trust and relationship between us. Boyfriend, I'm really sorry.

I know that apologizing can't completely make up for the harm that my mistake has caused you. But I really want you to know that I realize my mistake and will take responsibility. I also understand that it may take you some time to accept my apology. Boyfriend, I promise I won't let you down this time I will use my actions to prove that I really want to save our relationship, and I will change for you.

Finally, I want to assure you again that my apology is sincere. I love you and I don't want our relationship to end. I hope you can give me another chance to prove myself again. In our relationship, I will cherish you more and respect you. This time, I will make our relationship better. Boyfriend, please forgive me again.