Romi has always loved Ishita with all her heart.
I feel he is one of the most purest character in YHM
yes he hs done many mistakes bt I hv seen one thing is constant-dat is his love he has fr his bhai and bhabhi.
during bhoot track he ws always by Ishita's side and was even hurt on seeing her in such condition.
today also even after knowing what Ishita did was wrong he ws defending her and even was going to open the door.
p.s.:I doubt he had any such bond with shagun when she ws his bhabhi