The Shayar says that as if he had to account for the love, he devoted his heart to something else.

This profound couplet speaks to the deep sense of accountability that love imposes. The poet, Mir Taqi Mir, feels that his love was something that needed an accounting (muhasba). Because of this perceived debt, he decided to invest a piece of his very being—a piece of his heart—into that relationship. It's a beautiful depiction of self-sacrifice and the overwhelming nature of true affection.