we don't know what is the complete story of Abhay, Maithili & Sid...at present its difficult to believe that Sid ever really loved his bro...as u said mayb he could not take rejection by Maithili and Abhay. Whatever it was...in reality Sid is the most lonely and weak person...relying solely on his vampire supernatural abilities, and bringing out the mos evil part in him, but no love related emotions or memories are there, for him, nor will there will be. ,he lost it all to his mayb own demons.
n yes...the other line I loved was... "Who will save Abhay"...i still cannot understand y can't Abhay ever take the chance of telling all the truth to Piya..including bite one...she would not have been so pissed off as she would be now...or misunderstand him. like u said...mayb he is taking his superhero abilities too seriously...n also maybe he has resigned himself to his fate...that he is destined not to get his love, cheris that forever...he can only have the memories, the past, but no future!n yes...i too found that scene odd as if she is a reincarnation oof Maithili, as if she has been here before!