The only difference is the boy who is committed to her, a boy whose present she is never made use of words. He clearly articulated his deal in clearest of words. If his deal can be articulate why not his changed feelings? I agree actions are there and I feel bad for Virat but no amount of romantic gestures, mannerisms can erase his strongly worded Vada. Sai clearly told him why she still considers this a deal marriage- Pakhi is the reason. He cleared it to Pakhi but not to Sai, instead the next day asked Sai why can’t she extend friendship towards Pakhi (Morning of Mahasivratri) His non confrontational nature is doing him no good. Also even during Holi episodes when he was sober Virat was like Kya mei usse pasand karta hu? Only when he was drunk he confessed his feelings. He needs to muster up courage.
His romance, closeness for Physical intimacy is not a reason valid enough for Sai to forget the deal. It can be but only when deal and Pakhi confusion is cleared. When Sai told Tai she wants to leave after becoming a doc, I felt so bad. This girl is clueless as to what’s going on. Just like how Virat wants his actions acknowledged, Sai wants him to verbalise his feelings. Communication is more important in a relationship. I am not blaming either but Virats deal proposition is a big factor here