even before that he was keen on teaching her a lesson for making him almost leave sanjeevani.
sid on shanky's request made his decision to help ridz to reach armaan. from then on sid's sole aim was ridz's happiness.
sid was in love at that moment and from then on it was gradual process of realisation.
thruout the journey there were many eye-locking moments and in every such scene sid's eyes spoke volumes.
i think realisation came in the village wen he saw ridz in a saree for the first time.