I gave up my longing for you, and this is its outcome, that now it truly feels like this is your doing.

This couplet explores a beautiful irony. The speaker expresses that they let go of their longing or desire for someone, perhaps even gave up hoping for something specific. And the surprising result of this surrender is that now, it truly feels as if everything happening is the doing of that very person, or perhaps even fate itself. It suggests that by releasing their own grip and expectations, they've created space for the other party, or for destiny, to actively work its magic. It's a profound thought on how sometimes, letting go opens doors for unexpected and purposeful outcomes.