one question in mind after yesterday tagline

the tagline for yesterday is arnav ne kiya pyaar ka izhaar kya khushi ko rahega yaad means arnav confess his love will khushi remember.
now i have a question is why they dont say will they both remember or will arnav remember it or why they ask only for khushi.so i dont know but how if arnav remember what he said last night on holi and also what khushi said to him and his doubts grow up for shyam and brain starts work.or maybe khushi remeber it which is not possible but then trying out find out the reason why arnav hately married her when he love her so much.now i know that maybe both scenario will not come and in the end they both dont remember about there confession but it so predicted. i hope cvs did something which is not as predicted and little twistful in good way.i am very confuse what will happen after holi and then there is bhaiyadooz and there definately arnav promise something to anjali or maybe anjali ask something and i hope i dont confuse all of you.