There is nothing much I could do

It's damn irritating...

I didn't mean to hurt a friend, I don't know this friend could be so sensitive on this STUFF...

Why am I always regret easily after I have done something/made a decision... something/decision that not everyone could claims it is right... why am I always not sure...

There is nothing much I could do, I had apologized... is it ain't enough? Is it the way you want me to get my come-uppance?