yash know the reason but if he want to tell everyone of his family that he is possesive for arti who spent her night with the another guy alone than everyone blame on her character and that he never want bcoz he know very well that this his dilemia to between his heart and mind and it is not understand by anyone.
he also not share his pain with arti bcoz he never know her feeling and never want give any forced to their relationship. Once he thinking that he betrayed arpita by falling in love arti and another he think he can't forced arti to aceept his as husband. He feel all the pain alone and never want arti shameful to infront of anyone. He only want to space with her