I am sorry for what I have written. I reflected on my behaviour and found it to be a shame. I had known my mistakes and promised that I will not conduct such behaviour again.
I hereby express my sincere apologies for what I have done. I hope that you will forgive me.
I am sorry for what I have written about you. I found my behaviour to be wrong. I known I have caused you pain and promised that I will not do things to hurt you again.
I truely sorry for what I have done. I hope you will forgive me.