sid makes lot of efforts to keep people away from rashami
he comes across as very insecure of her
initially it looked like he is scared of things she knows about him and might reveal to others & thus destroy his reputation, so he was extra cautious
but now it looks like he genuinely liked her at some point of time & she rejected him & thus he is so vengeful towards her
though rashami seems to have moved on & is completeely neutral towards him, but he seems to be avenging her using this game
sadly he gives me a rejected dejected lover type feeling