There are many reasons as to why Taani wants to leave now and go away from Rey coz staying back will make her weak because she loves Rey too much to stay away from him and that is why she wants to leave.As far as Taani is concerned then she is right in her own place .What all Rey did we all know his intentions were noble and he did that for her own good but his approach was totally wrong which has resulted in all this chaos.Had he just talked to her for at least once and tried to make her understand back then things would have been quite different now.But anyways the damage has been done already.Right now Taani is fighting her inner demons.Her insecurities are haunting her.Whatever Rey did so as to mould her as per his own wishes has resulted in a loss of faith on Rey and Love from her side.Rey was not able to accept Taani as she was and hence tried to change her.And now she is extremely hurt due to the same.She is afraid that if they get back again and if in future difference of opinion yet gain happens between them so will Rey yet again do the same thing and will try to mould her as per his wishes.A relationship comprises of two individuals and if one person takes all the decision himself then the consequences and damages are gonna be fierce as we are witnessing in TR's case.Now Taani has become that individual whom Rey wanted her to see as.Rey has made her think that they both are extremely different individuals and hence can't be together.As she had said earlier-ki agar main aapke paas wapas aayi toh fir is sabka koi fayda nahi hoga sab bekar chala jayega(all the efforts made by rey to make her a career oriented woman will go in vain).She is also afraid of the fact that if she gets back to him she'll again become the same old Taani whose life started and ended with rey and whom Rey had rejected and hence the break up drama.The fear of rejection is also haunting her.
On the other hand Rey can't be blamed either.Taani is of the opinion that Rey was not ready to accept her as she was but the fact is that in the last days she too had changed a lot and changed for her bad and the problem is she never realized the same.she was not the actual Taani whom Rey ahd fallen for.She had started becoming too much dependent on Rey.Her life used to revolve around Rey even previously but she never ever pulled herself back from her duties as a GS and her responsibilities as a college student which she had started doing lately before the break up.All she could think about was marriage and Rey.And Rey held himself responsible and guilty for this.He started thinking that his love is making Taani so weak and he can't see Taani falling weak but rather wanted his love to be her strength.And hence he took such a drastic step.He was ready to be the villain in her life so that she could be the hero of her own life.Whatever Rey did was extremely difficult on his part.His intentions were noble but yes his approach was totally wrong.He should have had a simple heart to heart conversation with her right then to make her understand and realize what she was doing.Had he done that before then all this could have been avoided.And now it's just too late to mend things.The damage has already been done.
Both Taani and Rey have their own reasons for the situation in which they are today.Both may be right at their own places and both may be wrong at some point or the other as well.But right now the situation is playing its trick.None of them can be blamed now coz the situation is to be blamed right now.The best thing right now which can mend their relationship is TIME.TIME is truly the biggest healer and I hope this saying proves true in TR story as well.Right now just waiting for our angel to return back coz none of us have any clue as to what will be the next track.We have many questions unanswered right now.Hope all our questions get answered soon.
P.S.-Sorry for the long post.Couldn't help it