A and I were walking along the new Asia stairway to the Chung Chi college for our lecture and I saw him with her.  He put one arm around her shoulder and laugher brightly and joyfully.  I did not dare and did not want to look, just walked by them quickly.  The interest of talking to A disappeared and I just wanted to remain silent.  But I did not want A to know and so I left him and went to F.  I should have expected this to happen.