Admitting mistakes: I have to admit that I was wrong.
I admit what I've done is wrong.
I shouldn't be like this.
Sorry. I know this was my fault.
I'm fully responsible for this matter.
I have made a mistake.
It's my mistakes. Forgive me.
Yes, I take the blame.
I was the one to blame.
I'm sorry. I shouldn't have done that.
I never intended it that way.
Useful responses:
Don't mention it.
Let it go.
That's fine.
Just take it easy.
Don't do it again.
Forget it. It doesn't matter.
That would be okay.
Don't worry about it.
It's okay.
