well this is the first episode after the leap. The dynamic will change between them but it won't happen in one episode. Otherwise ksg wouldn't be promoting and ekta wouldn't order HS to delay episode. Let's not forget this show has two big fandoms. We should just enjoy the prerish scenes as they come.
Coming to the revenge part it makes sense. She lost her child it seems and that's a big thing. Not to mention ex trying to kill her. I have a feeling while she takes revenge with bajaj helping her she will start developing feelings for him there.
8 years atleast friendship but nothing it's visible