see i agree with both of u here..i m not telling dev was absolutely right..of course he was a bit childish in doing such stuff as lovelydi said..but again it becomes difficult for a person to even think sensibly when he knows there only few days left to his life😭...now as lovelydi said he could hv told the truth to kaju and asked her to marry dhruv...thats perfectly right but then dev thought that kajal would hv never loved dhruv even after marriage,so its better i sabotage my image in front of her so that she hates me to an extent that she starts loving dhruv..
but this can happen in a daily soap only😉