The promo indicates that Abir plans to confess his feelings and then stops himself due to some reason. After yesterday and today's episodes, Abir has begun to realize his feelings but is still in confusion/denial mode, and is yet to clearly admit to himself that he is in love. The whole "sirf dost" thing and viewing Mishti as Kunal's future wife has gone to Abr's head, and has made him super guilty. I wonder how he will even think of confessing to Mishti in such a situation, when he hasn't even done so to himself yet.
The promo indicates that Abir's realizes his love this week and plans to confess but stops himself due to some reason. Is it a little misleading, and is actually only indicating that Abir realizes his feelings and stops himself, or are we supposed to understand that Abir overlooks the fact that Mishti is intended for Kunal, and decides to confess anyway, but is stopped by something dramatic (like either Mishti or Kunal being interested in the other or deciding to get engaged)??