He did realise it you can see it in his expression but he wanted to push Pisaeng away thinking it can "fix" things.
His mind only think of pear maybe. If i'm kawi i also dont know what to do to fix everything and maintain his friendhip with piseang. Also not hurt pear in future. I hope pear make clear with kawi that she not in love with him. Just friend. Friend only. Kawi, please dont be stupid next ep. Hahah i'm emotional in ep3.
A lot of NC scene. For first couple i drop after few episode. For second couple acting is good. But i still drop after few episode. I just watch ending.