It means that we will see a stranger near you, because even in company, genuine friends exist.

This powerful couplet is a cautionary warning about the nature of human relationships. Mir Taqi Mir suggests that even when surrounded by people you consider friends, you should remain vigilant. The 'strangers' (gair) lurking near you are not necessarily outsiders, but rather those who pretend to be friends. It speaks to a deep disillusionment—the pain of realizing that even in your closest circle, betrayal can hide.