thankyou all for such kind answers

I am very grateful.

my mind is not always preoccupied with my mistakes, only on this problem.

I try to tell myself how much everybody makes mistakes because I know it is true, and I always forgive them. but i still don’t like to do it, especially when people talk about it.

the mistakes come from bad social skills and people interaction skills.
usually they happen because I don’t think before I speak or before I do something.

So perhaps I say something but it might be that someone is offended by it because I forgot to consider their unique situation.
or my words sound very hard and mean but actually i was trying to be kind.

It is in a part of my job which I don’t have to do but it is the best part of the job so I want to do it.

But I have the same problem with friends that I don’t think properly about what I do. my friends tell me I am harsh. I feel bad when they are hurt, too.