You and your best friend both cleared the NDA written exam. Both went for the SSB interview and your best friend was unable to crack the exam and was screened out whereas you will clear the interview. You will.
1
Stop talking to him for the time he gets normal.
2
Try to console and motivate him for the next time.
3
Talk to his parents about the shortcomings in his preparation.
4
Scold him for getting screened out