By the look of it, I dont think preeta is anyway near reconciliation with Karan. She may (most probably) forgive him for her own peace but I don't see them spending life together.. not as a person who absolutely despised the way Karan behaved and what he did to her but because of how characters are shown.
From yesterday's episode , one thing is clear though I may be wrong that Karan will be the one to come on his knees first. (Should be). I don't think until yesterday he ever spoke about how much he missed her. But the egoistic soul didn't let her read it but the ice is breaking due the fear of probably losing her forever or being caught up in a relationship which he didn't want to be in. He was so desperate to get a reaction out of preeta that it was both funny and saddening.
The way in which the story and characters are folding, I am pretty much sure when Karan will let down his guards and realise about horrendous unforgivable act, preeta will steel up and rightfully so, she will say she forgives him and it's time they both move on. That will be the end of Karan Luthra. The day preeta decides to move on in all literal senses , Karan is going to lose his sanity. I think yesterday was a glimpse of it.
I may be a preeran fan earlier but it will be unfair on preeta's character if Karan and she patch up. I won't mind an open end if Ekta has Karan preeta as end game.
What's your opinion?