Didn't Rohan overhear BQ plotting with RagsMen? I too found it hard to swallow that he tells her he loves Suhani--and yes, that whole thing's been rushed, but I think it's so Rohan's feelings are established before he gets an inkling that Yuvraj isn't indifferent. Note what BQ told him--that Yuvraj na toh apnata hai, na usse jaane deta hai, or words to that effect. Rohan will struggle with doing the right thing or getting what he wants. Somewhere along the way he will either begin using BQ or ignore her instructions. Problem is he needs her approval to stay in BH, so best-case scenario may be he'll pretend to go along with her, as long as it suits him. But please, not another snaky-type track.
Hope he uses her. That sounds fun...someone using her...good for a change.