Screwed up again

I just blundered again. I really don't know how people think and how people function. I was only thinking of preventing something from happening. Guess I approached it wrongly. In the end, I made the person cry. The person said that it is now a situation of no choice but to allow it to happen. I really need to gain some common sense that normal people have. Who can teach me that? Why am I so stupid?? It's back to self-condemnation once more..