Coming to Rey, now I feel so guilty to doubt his love for taani, he's an epic actually...the hurtful things he said to taani, hurt him much more than they hurt taani. And this time, he's gonna hurt everytime, every moment without having taani for a moment by his side. And it's gonna be the most impossible thing for him, because it's taani who keeps him together, who is his integrity, when she used to be away from him for a bit time even before confession, he used to be ut of his control, without a hold on his behavior, his anger, his rudeness, but this time he doesn't have that option too. He is stuck where he's no option...he has to suffer this torture without any relief...
Now taani, her love for Rey... for her love and relationships means world. love is her life, and now when her life is not happy with her, she would let it go. Because as once taani said "aise nahin dekh sakti main aapko" she cant see him hurt in any case. So now she'll give him the "chutkara" he wants. And it's like leaving life for him...an emptiness is gonna surround her...
However i feel it will be really good for her individuality as she said "Mr Reyansh singhania ka chapter close karne ka time aa gaya hai." I felt the echo of herself, which would lead her to think about herself rather than an identity of Reyansh.