It was more of an overwhelming feeling.
I too had tears just like Arnav, after Khushi's innocent confession of her love.
'aisa kyun hota hai jab hi aap hamare paas aathe hain, tho hamare dadkane tez ho jathe hain'
My heart beats along with Arnav & Khushi.
http://www.dailymotion.com/video/xzizm1_iss-pyar-ko-kya-naam-doon-episode-209_shortfilms
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