m definitely sure...
i came to know through following points
1 it is not shown till date tht he has flash backs of his confession while zoya was shown remembering all of them...
2 on the dining table he was purposely trying to b cheesy wth tanveer so tht is hurt
but he cant see zoya coughing tooo
3 moreover he purposely was ignoring zoya in front of tanveer about tht shayri thing...