I find this take interesting on RaghVi's relationship even though I don't 100% agree on it.
In fact, even till yesterday I was wondering ye Mandar ko laane ki zarurat kya thi but I understand now that he's a crucial key to test RaghVi's relationship.
Raghav and Pallavi have grown and bonded with each other all this while but let's analyse it to the core. Why did they get together in the first place?
Raghav married for amma,Pallavi ka reason I'm not exactly sure since I wasn't a regular viewer back then but it was sth tied to D family. So, whatever their actions were,they were somehow related to either Rao family or D family or both.
Even Raghav's initial intention to patch things up between Pallu and that Sanki family was becoz amma said "warna tu mujhe phirse kho dega" plus his own guilt of defaming her character while she got him back with his family.
However, he has already developed feelings for her. There have been so many sequences and silent gestures that showed she's a crucial part of her life now. There are things he did and said gave indication to that without directly saying he loves her.
But like everyone else said already, he is yet to realise the depth of his own feelings for Pallavi. This is where Mandar will step in and act as a catalyst.
And rahi bat Pallavi ki, she chose Raghav for herself and will make the same choice again when it is needed regardless of Mandar.