With due credits to the melodious OST of silsila, I feel the lyrics kind of don't go with the story of season 2. Hence I have tried to put my words in the same tune such that it does justice with the current story. It is totally as per my understanding of the story so far, apologies if it doesn't match with your idea of the story.
In season 2, mishti has been someone who values commitment so much, yet has feelings for some other guy and it confuses her initially. Whereas ruhaan is a guy who is struggling to fight his feelings for a girl who is his friend's fiancée. Even after their struggle, they lose themselves to their hearts.
First stanza is about their phase of confusion, second stanza about Mishti's decision to let love take over commitment and third stanza about ruhaan's journey in love
So here goes the song-
Ae dil farebi hai tu bada,
Kaisi hai ab yeh sazaa...(ruhaan)
Kyun chahta hai tu kisko,
Jaanu na koi vajah...(mishti)
Na chahte bhi, bevajah fir bhi
Pal mein shuru ho gaya
Yeh silsila...Haan yeh silsila...(duet)
{My heart betrays me, what kind of a punishment is it...(ruhaan)
Why my heart likes someone, I don't understand the reason...(mishti)
Though we didn't want it to, though it had no reasons, started in a moment...the silsila...(duet)}
Dard hota hai jab koi dil tootata
Yeh toh hai mujhko pata...
Dil hai bebas par, usse chahta bekhabar
Na hai yeh meri khataa...
Ae dil, tu sun le, dhadkan meri k
Kar de shuru ab naya
Yeh silsila...Haan yeh silsila...(mishti)
{It pains when one's heart breaks and I know that pain
But my heart is helpless, it loves somebody else, unknown to itself
My heart, listen to this heartbeat telling u to start this new silsila...(mishti)}
Ab samajh raha hoon ishq hota hai kya
Hai haseen yeh samaa
Ek pal mein isse main sametu zara
Chhupa du main dil mein yaha
Jab se dekha hai, tujhe dil haara hai
Khud se hai tujh tak ka yeh
Yeh silsila...Haan yeh silsila...(ruhaan)
{Now I am understanding what love is like, its a beautiful world
May I just grab it all in a moment n store it here in my heart?
Since my first sight at you, I have lost my heart to u
From only about myself to everything about you, it has been a silsila...(ruhaan)}
Hope y'all like it. N hope at least this post doesn't fetch any fan wars😂