@Adaerra For Hamza, however, comfort comes first. Even if it was something as simple as a doctor caring for him. I believe they are both starved for intimacy. In his pov chapter, he stated that it was not love. It was just... something he couldn't identify. Not every form of comfort is love, and not every type of love is romantic. He might have become attached to her hairband because it reminded him of being vulnerable and cared for, even if only for a few minutes.
Of course, he does not fall in love with every doctor he meets, but not every doctor has the courage to tie his hair on the first meeting. Again, mission first: get closer to her and Dawood's syndicate, extract information, and do regular agent work. But, like all humans, he develops feelings. Sometimes much more than we expected.
A person can love while lying; loving someone does not imply that the betrayal or feelings were false; this is human nature. And I believe that is the honest form of love, in which you allow yourself to be vulnerable enough to be comforted while maintaining your integrity. Love does not always heal; instead, it teaches.