The fondness/affection is said to have been in the 'Mir' (the poetry/style of 'Mir'), from where I am coming on your street. It suggests that the depth of love or memory was found within the poetic tradition or the works of a great poet like 'Mir'.

This profound couplet captures the essence of a lover whose very existence seems defined by the beloved's presence. The poet suggests that the true value or significance of 'Mir' (the self) is only recognized when he approaches the beloved's street. It's a declaration that his identity, his worth, is inextricably tied to the memory and magnetic pull of the beloved's love. A beautiful expression of devotion!