I don't think it's right to say that Zoya's emotionally challenged just bcoz she was not romantic at date.
See the matter from her side..what she has got from Asad is only "u r misfit for me n my family" "u don't deserve to be a friend or wife" "u r irresponsible" blah blah..Asad loves her but still doesn't like her so much.How u believe that a man who always keen to find ur fault,shouts on u in front of everyone,considers u as undeserving for him can love u??He never expressed his feelings in words to her.Being a simple n innocent girl it's so difficult for Zoya to understand his unnatural mindset..no she doesn't understand it..specially when the emotion is related with herself.She can't think that she could get the top position of his priority list ever..it's always belongs to his family n Tanu.So,it's a hell shock for her that MR. KHAN LOVES HER.
Her feeling are very natural n genuine.Even she doesn't know whether he'll ever love her back or not she'd love him unconditionally.