I feel something has to happen to krishna or the threat of krishna leaving him in any way has to come first because forget confessing his love, he hasn't even properly recognized it himself. Once he realizes then that he can't be without her or bear being alone like he was before, he'll become more possessive and maybe even angry in a cute way. He's not that good with relationships verbally understanably and krishna understanding this thoroughly would be seeing the change but try to get his feelings out. It's a long process for sure to keep sayyams character in tact, but with the oppertunities like holi and the yuvan track to come it'll be very interesting to watch.
Yes it's a long process considering Sayyam really struggles to showcase his emotions. He definitely won't be able to say anything directly or realise his love until a desperate situation arises. I hope the Cvs just don't rush it and bring proper justice to their love story. They have shown a nice build up until now, even with 2 mins scenes. I'm looking forward to holi too and hoping they start focusing on Kriyam more after this Baba track.