It's just that he trust his friend. Pari was so sure that Ruhaan also feels about her the same ke even Arnav was convinced about it. and usne wohi bola jho usko laga. I know they shouldn't have talk about it without conformation but Arnav ruhaan se conformation lega tho bhi kaise, he don't like him much so they are awkwardness between them 😆 and woh Pari ke baato se itna convince hogya ke Ruhaan se bhi same baat poch kar he might not want to hurt himself more 🤔