after that he has never accepted being love with her. After the C day while talikng to himself he just says sirf isliye ki mujhe Sidhi se ... and stops there
Again when Sidhi falls over him, he thinks that what ever his heart says he should not listen to that
and even in yesterday's episode he says that he can never love Sidhi
Only Sidhi thinks about the good moments of the C-day, Kunal only remembers his father telling about Anand's barsi
So I doubt whether he loves her or not