I have seen many people questioning that we only saw Pallavi realizing her love for Raghav but not the other way round. But I think we did and I'll be mentioning my reason below.
Well, if noticed carefully, Raghav has been shown feeling show kind of affection or attraction towards Pallavi. There were so many times when he would get mesmerized just by looking at her. Then there always was smelling her hair. And given the fact that how kind and generous Pallavi is, Raghav falling for her is so obvious. Even though they had the relationship of enmity, there was always an underlying attraction working in him.
That being said, I also feel Pallavi's perspective of falling in love with him was more important because she was a widow who didn't believe that she can also love someone. Then Raghav bending his ways only for her, his hidden good nature obviously pushed her more towards him. She herself needed more reassurance that she can be loved too. The moment she realized that, she found her falling for Raghav.
Thus, I think their confession and everything that led up to that moment was perfect.