I think you viewed that scene with more expectation than what actually happened in the scene😆.....the only new thing Adi said in that scene was to ask Imlie to marry someone else....if she was really so bothered by all the other things he's said before this, she'd have long left him.....but she never did....until this particular moment in time. So it's important to remember what particularly hurt her in that scene rather than thinking that she took some grand all-encompassing stance against Adi's injustices towards her.😆.....she was hurt that he didn't understand her viewpoint that she only considers him her husband and won't marry someone else.
As for expecting Adi to give her some kind of commitment at THIS stage in the story😆......again, please rewind and remember where he is mentally right now.....he is in a very confused state and nowhere close to understanding the connection he feels with Imlie.....For Adi to give any commitment to Imlie would involve him stepping back from Malini.....he isn't CONSCIOUSLY going to say, "Oh it's cool, I'll just juggle two wives in the same house"😆 right now.....so he is definitely not going to bring Imlie back by saying, "Yep, you're my wife too, come join the family and live there as a bahu"😆.....he is not in a state to make any commitment to her in that sense until he starts to realize what he feels for her.....and that will also take a while given his current state and the kind of person he is.....which is why I said that all he can offer to her at this point is an apology, regret, and another variation of responsibility that he wants to take care of her/help her.
Worth noting that whenever he is in PD, he ends up calling her his wife in front of some person or the other.....lol maybe that will be enough to melt Imlie again temporarily. We have to understand how the story functions....at a very slow place.....the last three epis implied a shift to some extent but the things you are expecting aren't possible right now.
The whole basis of Adi-Imlie's relationship currently isn't that she is expecting/waiting for him to declare her his wife....she is quite cognizant of his conundrum too....so she isn't waiting on that....this decision to leave is an emotional decision she's taken in a lot of hurt....the helplessness of her situation is bound to get to her from time to time....but at the end of the day, her coming back will also be an emotional decision cuz she feels emotionally bound to him....he does too but they both don't yet know how to label it/navigate it.....she calls it an emotion sickness....he calls it bechaini😆....they are both yet to understand the true depths of this visceral connection between them.....and until they do, they will keep going back and forth like this....tadpoing for each other without really knowing how to manage it.
It's possible she comes back for the Tripathis after they fake some lame excuse....but for that, Tripathis will have to know where she is😆....and right now it seems only Adi knows where she is....he is the only one who saw her getting on the bus to PD....so ideally he should make the trip to PD to talk to her.....and I personally feel the story needs a round of Adi making efforts to talk to her beyond this one bus convo where he failed to stop her.....it's possible she may also come back for Nishant....maybe he will have one of his leukemia fainting spells in her presence and she will come back to tend to him. But all in all, the guilt that Adi is in right now makes it likely he will make the effort to go to her.....and then other incidents may converge to bring her back somehow again.
You have said it all so beautifully .. one has to understand this isn't a story with a straight graph there is a lot of ups and downs and complications and nothing in this journey will come easy to any of them.. right now they are far far away from acknowledging the rishta and honestly it will not even fit right now if it comes all of a sudden there are so many realizations that need to come and I would like them to take it one step a time solve their equation by taking baby steps slow and steady .. this is just pehla kadam towards that realization...