We have all said things that we regret and did not mean. These may have affected other people. Some may feel bad about it but never got a chance to apologize or were to stubborn to do so. Or maybe you just have something to say to someone that you love but prefer to remain secret. Whatever it is, writing anonymous letter may make you feel better.
I will begin...
Dear Anonymous,
I was very angry and impatient and took my anger out on you. You were just being yourself. Perhaps our personalities clashed a bit but i had no right to treat you like that or make you feel excluded. I took my own issues and bottled-up anger out on you and that is not okay. I was aggressive without reason. I feel really bad for it and wish i could see you to apologize. In the future I will be more understanding as I am often misunderstood and want the same.
Sincerely , Amindistan
Here is another.
I was too preoccupied to thank you and basically beat myself up about it. You seemed really angry and i sensed anger after i thought it was resolved. I know that you think i am negative but i really appreciated your help and really liked you. Sorry, I messed up yet again. Sometimes I think that I don't deserve to even interact with other humans.