These sentences are in the same song, whatīs the difference?
Na jaane Kahan kho gaya hai mera yeh dil
Na jaane Kahan kho gaya hai mera yeh maan
Mann and dil are the same so no big difference
And the context of the another sentence:
rakh loon chhupaa ke main kahin tujhako
Let me hide you somewhere
saayaa bhi teraa naa main doon
Where your shadow can not reach
Let me hide u somewhere
I shall no even give away your shadow. (Hid him or her so well)