lost a job opportunity

I just got the bad news. For 3 months, I am was looking forward to it. The fact is that Tthe informal pre-interview with the boss went pretty well. She said "Welcome to the team", and I even have been was asked to renew my application form for this position. The boss told me the formal interview would just be a formality. So I just waited for the day. However, someone supported by the big boss just stepped in and took the positon. Why does this kind of thing always happened? How could I persuade myself not be sad?

I am sorry to hear about your bad news, but as they say, "when one door closes another door opens." I am sure another opportunity will come up for you. Just be patient. Good luck!