As far as his reaction on tearing the photo, I think he became conscious of Gopi and made sure that it will not fall in her eyes. Just see these reactions of Ahem are confusing to viewers to make them glued.
Ahem has already fallen for Gopi, only thing left is verbal confession which is gonna happen soon.
My guess is by Ahem's birthday which is in the last week of april or in the first week of may (2nd anniversary celebrations of SNS, ahem will confess his love.)
wait and watch.