“Kabhi kisi musafir se pyar na karna
Unka thikana bohut door hota hain
Woh kabhi bewafa toh nahi hote,
Magar unka jaana jaroor hote hain”
(Unknown poet)

Roughly translated…

Never fall in love with the traveler
His address is invariably too far away
He is never unfaithful to you
But his journey (away from you) is inevitable