Kab Yaad Mein Tera Saath Nahi

There is this poem by Faiz Ahmed Faiz

mushkil hein agar halaat wahaan, dil baich aa’ain jaan day aain
dil walo kocha-e-jaanan, kia aisay bhi halat nahi
kab yaad mein tera saath nahi, kab haath mein tera haath nahi

what does this word mean? kocha e jaanan, kocha is like a corner street right and janaan would be sweetheart but over here how does that come into place. what does the poet mean.

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