1) May be Raman has totally lost interest in things like LOVE. He feels its better to think from the mind than the heart and practically speaking marrying tondons sister will be a good prospect for Mihir as well as Bhalla industries.
2) Raman feels Mihika is not the right girl for Mihir bcoz she didnt stand up for him during his worst...when he was blamed to make an MMS of her. Rather than supporting him she didnt stop Bala from hitting Mihir.
3) Raman just wants to prove his point to Ishita. This fits the best for me bcoz Raman is obcessed with proving himself smarter than Ishu 😆 😆
What do u all think can be Raman's probable reasons for being so against Mihir-Mihika.