Also one more thing. RK's layered character,and him still not realizing what he is feeling for Madhu is love, then I feel there should be a good reason for that. Why he is like that. Why he is so complex. he has already fallen in love with Dipali once (Then it might not be real love, I understand). But he is a 29 year old grownup man.
When they started to show his past like him seeing his father hanged and his relationship with his mother and his relationship with his step dad, we were quite convinced he has a dark, a very tragic past, where he might also kind of involved in some way. And him kind of balming himself for what happened to his father.
So it was easy that time to relate to him, why he became the man he is. But after revenge all his dark past stories just end up with nothing except a silent MU between his mom and him. if his patch up with his mom too turn out to be as fake, then it could have been more understandable.
I hope there is more to his father's suicide and they show how it affect him, maybe then we would be able to understand his changed behaviour and his confusing nature.
Otherwise there is no reason for him to behave like that at all. Mostly people become like that with some tragic past and a bad childhood.